Rainwater which falls on a flat rectangular -Maths 9th

Rainwater which falls on a flat rectangular -Maths 9th
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6 m = 600 cm, 4 m = 4 x 100 cm = 400 cm  Volume of the rainwater = 600 x 400 x 1 cm 3   Let the water level in the cylindrical vessel be h Volume of the water in cylindrical vessel =  πr2h  = 3.14 X (20)2 x h According to statement, 600 x 400 x 1 cm3 = 3.14 x (20)2 x h ⇒  h = 600 x 400/ 3.14 x 20 x 20 cm  = 191.08 cm
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This method shown here is termed as A. Surface water harvesting. B. Rain water harvesting. C. Roof top rainwater harvesting. D. Flat top rain water harvesting.

Description : This method shown here is termed as A. Surface water harvesting. B. Rain water harvesting. C. Roof top rainwater harvesting. D. Flat top rain water harvesting.

Last Answer : C. Roof top rainwater harvesting.

The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs.10 per m2 is Rs.15000, find the height of the hall. -Maths 9th

Description : The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs.10 per m2 is Rs.15000, find the height of the hall. -Maths 9th

Last Answer : Let length, breadth, and height of the rectangular hall be l, b, and h respectively. Area of four walls = 2lh+2bh = 2(l+b)h Perimeter of the floor of hall = 2(l+b) = 250 m Area of four walls = 2( ... of paining the walls is Rs. 15000. 15000 = 2500h Or h = 6 Therefore, the height of the hall is 6 m.

A metallic sheet is of rectangular shape with dimensions 48 cm x 36 cm. From each of its corners, a square of 8 cm is cut-off and an open box is made of the remaining sheet. Find the volume of the box. -Maths 9th

Description : A metallic sheet is of rectangular shape with dimensions 48 cm x 36 cm. From each of its corners, a square of 8 cm is cut-off and an open box is made of the remaining sheet. Find the volume of the box. -Maths 9th

Last Answer : When squares of 8 cm is cutt-off from rectangulare sheet then, Length of box (l) = (98 - 8 - 8) = 32 cm Breadth of box (b) = (36 - 8 - 8) = 20 cm Height of box (h) = 8cm ∴ Volume of box = lbh = 32 x 20 x 8 = 5120 cm3

The whole surface area of a rectangular block is 1300 cm2. Find its volume, if their dimensions are in the ratio of 4 : 3 : 2. -Maths 9th

Description : The whole surface area of a rectangular block is 1300 cm2. Find its volume, if their dimensions are in the ratio of 4 : 3 : 2. -Maths 9th

Last Answer : Let the length, breadth and height of the rectangular box be 4x, 3x and 2x, respectively. ∵ Total surface area = 1300 cm2 2(4x × 3x + 3x × 2x + 4x × 2x) = 1300 52x2 =1300x2 = 25x = 5 ∴ Volume of rectangular box = 4x × 3x × 2x = 24(5)2 = 3000 cm3

A rectangular piece of paper is 22 cm long and 10 cm wide. -Maths 9th

Description : A rectangular piece of paper is 22 cm long and 10 cm wide. -Maths 9th

Last Answer : Since rectangular piece of paper of rolled along its length. ∴ 2πr = 22 r = 22 × 7 / 2 × 22 = 3.5 cm Height of cyclinder (h) = 10 cm ∴ Volume of cyclinder = πr2h = 22 / 7 × 3.5 × 3.5 × 10 = 385 cm3.

A metallic sheet is of rectangular shape with dimensions 48 cm x 36 cm. From each of its corners, a square of 8 cm is cut-off and an open box is made of the remaining sheet. Find the volume of the box. -Maths 9th

Description : A metallic sheet is of rectangular shape with dimensions 48 cm x 36 cm. From each of its corners, a square of 8 cm is cut-off and an open box is made of the remaining sheet. Find the volume of the box. -Maths 9th

Last Answer : When squares of 8 cm is cutt-off from rectangulare sheet then, Length of box (l) = (98 - 8 - 8) = 32 cm Breadth of box (b) = (36 - 8 - 8) = 20 cm Height of box (h) = 8cm ∴ Volume of box = lbh = 32 x 20 x 8 = 5120 cm3

The whole surface area of a rectangular block is 1300 cm2. Find its volume, if their dimensions are in the ratio of 4 : 3 : 2. -Maths 9th

Description : The whole surface area of a rectangular block is 1300 cm2. Find its volume, if their dimensions are in the ratio of 4 : 3 : 2. -Maths 9th

Last Answer : Let the length, breadth and height of the rectangular box be 4x, 3x and 2x, respectively. ∵ Total surface area = 1300 cm2 2(4x × 3x + 3x × 2x + 4x × 2x) = 1300 52x2 =1300x2 = 25x = 5 ∴ Volume of rectangular box = 4x × 3x × 2x = 24(5)2 = 3000 cm3

A rectangular piece of paper is 22 cm long and 10 cm wide. -Maths 9th

Description : A rectangular piece of paper is 22 cm long and 10 cm wide. -Maths 9th

Last Answer : Since rectangular piece of paper of rolled along its length. ∴ 2πr = 22 r = 22 × 7 / 2 × 22 = 3.5 cm Height of cyclinder (h) = 10 cm ∴ Volume of cyclinder = πr2h = 22 / 7 × 3.5 × 3.5 × 10 = 385 cm3.

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A design is made on a rectangular tile of dimensions 50 cm x 17 cm as shown in figure. -Maths 9th

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Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimensions 16 cm x 8 cm x 8 cm. -Maths 9th

Description : Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimensions 16 cm x 8 cm x 8 cm. -Maths 9th

Last Answer : Volume of rectangular box=lbh=16(64)=1024cm3 Volume of sphere=34​πr3=33.5238cm3 16 sphere=16(33.5238)=536.3808 Volume of liquid=1024−536.3808=488cm3

A rectangular plot is given for constructing a house having a measurement of 40 m long and 15 m in the front. -Maths 9th

Description : A rectangular plot is given for constructing a house having a measurement of 40 m long and 15 m in the front. -Maths 9th

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A design is made on a rectangular tile of dimensions 50 cm x 17 cm as shown in figure. -Maths 9th

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Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimensions 16 cm x 8 cm x 8 cm. -Maths 9th

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A square sheet of paper ABCD is so folded that B falls on the mid-point M of CD. The crease will divide BC in the ratio -Maths 9th

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What is rainwater harvesting? State two of its objectives. -Geography

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Mention two advantages of rainwater harvesting. -Geography

Description : Mention two advantages of rainwater harvesting. -Geography

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What were the traditional systems of rainwater harvesting used in Rajasthan? -Geography

Description : What were the traditional systems of rainwater harvesting used in Rajasthan? -Geography

Last Answer : Rooftop harvesting, rain-fed storage structures and tankas. Explanation: Rooftop harvesting was one of the traditional systems commonly followed in Rajasthan where the rainwater falling on the roof would go ... used in Rajasthan where large tanks also known as tankas were used to store water.

Why is rainwater harvesting better than a multipurpose project? -Geography

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Rooftop rainwater harvesting is quite beneficial for urban people. Do you agree with it? -Geography

Description : Rooftop rainwater harvesting is quite beneficial for urban people. Do you agree with it? -Geography

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How are rainwater systems prevalent in India with different names and methods? -Geography

Description : How are rainwater systems prevalent in India with different names and methods? -Geography

Last Answer : There are traditional rainwater harvesting systems followed in India. They are: 1) In mountainous regions, the technique named as kul' and gul is used where the diversion channels are built. 2) ... rooftop technique is used even today in urban areas to conserve rain water and use it when needed.

Which state had made it compulsory to build rooftop rainwater harvesting structure? -Geography

Description : Which state had made it compulsory to build rooftop rainwater harvesting structure? -Geography

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Write about the rooftop rainwater harvesting system prevalent in Meghalaya. -Geography

Description : Write about the rooftop rainwater harvesting system prevalent in Meghalaya. -Geography

Last Answer : Rainwater harvesting is the method to collect and store rainwater for various uses. It is also used to recharge groundwater aquifers. It has been in practice for a long time using different ... placed form the hill tops to the lower elevated regions, therefore the water flows with continuity.

‘Rainwater Harvesting is considered as a low cost and eco-friendly technique of preserving water resources’. Justify. -Geography

Description : ‘Rainwater Harvesting is considered as a low cost and eco-friendly technique of preserving water resources’. Justify. -Geography

Last Answer : Rainwater Harvesting is considered as a low cost and eco-friendly technique of preserving water resources.', Justify. Rain water harvesting is a method to capture and store rainwater for ... erosion, and flooding and arrests salt water intrusion in coastal areas if used to recharge aquifers

Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out. -SST 10th

Description : Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out. -SST 10th

Last Answer : (i) Houses in the semi arid regions of Rajasthan have traditionally constructed tanks for storing drinking water. They are big and are a part of the well-developed rooftop rainwater ... compulsory for all the houses to have rooftop rainwater harvesting structures. Defaulters are severely punished.

What is rainwater harvesting ? -SST 10th

Description : What is rainwater harvesting ? -SST 10th

Last Answer : It is a technique of increasing the recharge of ground water by capturing and storing rainwater by constructing structures such as percolating pits, check dams, etc. Importance:- (i) Rainwater ... rainwater store is extremely reliable source of drinking water when all other sources are dried up.

Explain the rooftop rainwater harvesting technique. -SST 10th

Description : Explain the rooftop rainwater harvesting technique. -SST 10th

Last Answer : (i) Rooftop rainwater is collected using a PVC pipe. (ii) Collected water is filtered using sand and bricks. (iii) Underground pipe is used to take the water to the sump for immediate usage. (iv) ... water from the sump is taken to the well. (v) Water from the well recharges the underground water.

Why is rooftop rainwater harvesting important in Rajasthan ? Explain. -SST 10th

Description : Why is rooftop rainwater harvesting important in Rajasthan ? Explain. -SST 10th

Last Answer : (i) The rainwater stored in tankas is an extremely reliable source of drinking water when all other sources are dried up. (ii) Rainwater is considered the purest form of natural water. (iii) Many ... There is lack of perennial rivers in Rajasthan. (v) The rainfall is not reliable in this region.

Give various methods of rainwater harvesting since ancient times. -SST 10th

Description : Give various methods of rainwater harvesting since ancient times. -SST 10th

Last Answer : . Guls or Kuls: In hilly and mountainous regions, people built diversion channels called Kuls or Guls in the Western Himalayas. A Kul or Gul leads to a circular village tank, from ... of Rajasthan, almost all the houses traditionally had underground tanks or tankas for storing drinking water.

Answer the following questions in about 120 words. Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out. -SST 10th

Description : Answer the following questions in about 120 words. Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out. -SST 10th

Last Answer : People in Rajasthan follow rooftop water harvesting to store drinking water. In the arid and semi-arid regions, the agricultural fields are covered in water storage structures which store the ... of water in plenty and thus, people refrain from using the rooftop rainwater harvesting technique.

Answer the following questions in about 120 words. Describe how modern adaptations of traditional rainwater harvesting methods are being carried out to conserve and store water. -SST 10th

Description : Answer the following questions in about 120 words. Describe how modern adaptations of traditional rainwater harvesting methods are being carried out to conserve and store water. -SST 10th

Last Answer : The traditional methods of rainwater harvesting are: 1. Rooftop rainwater harvesting is the most common practice in the states of Shillong and Meghalaya. Though Cherrapunji and Mawsynram, located at ... accepted and installed this system which has earned a distinction of being rich in rainwater.

What is rainwater harvesting? -SST 10th

Description : What is rainwater harvesting? -SST 10th

Last Answer : Rainwater harvesting is an efficient method of water conservation and management. The techniques of collecting and storing rainwater directly or recharging it into the ground through artificial means ... v) To solve problem of drinking water shortage especially in regions receiving less rainfall.

What is rainwater harvesting? -SST 10th

Description : What is rainwater harvesting? -SST 10th

Last Answer : Rainwater harvesting is a system in which rain water is collected through various techniques and then collected water is used in many ways. (i) Hill region - In hilly region people built diversion ... falling on the rooftops would travel down the pipe and get stored in these underground tankas'.

Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out. -SST 10th

Description : Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out. -SST 10th

Last Answer : Rain water harvesting in semi-arid region of Rajasthan is carried out in the following ways :- In Bikaner, Phalodi and Barmer, almost all the houses traditionally had underground tanks or tankas' ... falling on the rooftops would travel down the pipe and was stored in these underground tankas'.

Describe three traditional methods of rainwater harvesting practised in India. -SST 10th

Description : Describe three traditional methods of rainwater harvesting practised in India. -SST 10th

Last Answer : In India traditionally rainwater harvesting is done in the following ways :- (i) In hilly regions people built diversion channels like the guls or kuls for agriculture. (ii) In Rajasthan ... iv) In arid and semi-arid regions people convert their agricultural fields into rainfed storage structures.