State which of the following formulae is/are incorrect and justify your statement. -Maths 9th

State which of the following formulae is/are incorrect and justify your statement. -Maths 9th
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1 Answer

Answer :

(ii) V = ab + c, is incorrect As volume is three - dimensional, so each term in the formula must have a product of three letter terms.
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Last Answer : No, diagonals of a parallelogram are not perpendicular to each other, because they only bisect each other.

Diagonals of a rectangle are equal and perpendicular. Is this statement true ? -Maths 9th

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Diagonals of a rectangle are equal and perpendicular. Is this statement true ? -Maths 9th

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Last Answer : No, diagonals of a rectangle are equal but need not be perpendicular.

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2x + y = 3 passes from origin. Is this statement true or false? -Maths 9th

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The cost of a toy horse is same as that of cost of 3 balls. Express this statement as a linear equation in two variables. Also draw its graph. -Maths 9th

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he auto-rickshaw fare in a city is charged as ₹10 for the first kilometre and @ ₹4 per kilometre for subsequent distance covered. Write the linear equation to express the above statement. Draw the graph of linear equation. -Maths 9th

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Last Answer : Solution :- Fig. 3.12 represents the graph of the linear equation y = 4x+6.

It is known that if x+y =10, then x+y+z = 10+z.Which axiom of Euclids does this statement illustrate? -Maths 9th

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Read the following statement: -Maths 9th

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PQRS is a parallelogram whose area is 180 cm2 and A is any point on the diagonal QS. The area of △ASR = 90 cm2. Find this statement is true or false. -Maths 9th

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Last Answer : Solution :- As diagonal of the parallelogram divides it into two triangles of equal area. Since, area (△SRQ ) = 1/2 area(PQRS) area (△SRQ ) = 1/2 x 180 ... = 90 cm2 (Given) This is not possible unless area (△SRQ ) = area (△ASR ) So, the given statement is false.

The cost of a table is 100 more than half the cost of the chair write the statement linear equation in two varible -Maths 9th

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The sum of twice the age of Ram and one-third the age of Shyam is 62 years. Express the statement as a linear equation in two variables. -Maths 9th

Description : The sum of twice the age of Ram and one-third the age of Shyam is 62 years. Express the statement as a linear equation in two variables. -Maths 9th

Last Answer : Let Ram's age be x and Shyam's age be y. Then, 2x+1/3y=62

The total cost of purchasing two pens and three pencils is rs. 42. Express the statement as a linear equation in two variables. -Maths 9th

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Twice the number of marbles with Aman exceeds thrice the number of marbles with Vinay by 12. Assume the number of marbles with Aman and Vinay as x and y respectively .Express the statement in the form of a linear equation in two variables. -Maths 9th

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Five years hence , the age of Ram will be 10 more than the two thirds of Ravi’s age . Assume the present ages of Ram and Ravi as x and y respectively . Express the statement in the form of a linear equation in two variables. -Maths 9th

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The ordinate of a point is thrice its abscissa. Express the statement in the form of a linear equation in two variables. -Maths 9th

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Parliament is the supreme legislature of India.'Justify the statement. -Civics 9th

Description : Parliament is the supreme legislature of India.'Justify the statement. -Civics 9th

Last Answer : Explanation: in the Indian Parliament is the supreme legislative body . The parliament actually consist of two house and the president of India . Two house are Rajya Sabha and Lok Sabha Lok Sabha ... to by the president. After that this becomes the "act of parliament "and fully functional law.

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Description : Parliament is the supreme legislature of India.'Justify the statement. -Civics 9th

Last Answer : Parliament is the supreme legislature of India because it make laws that are applicable to the whole country.It is the highest law making authority in the country.It exercises control over the Council of Ministers and make them answerable and accountable to the Parliament.

Using IUPAC norms write the formulae for the following: (a) Potassium trioxalatoaluminate (III) (b) Dichloridobis(ethane-l, 2-diamine) cobalt (III) -Chemistry

Description : Using IUPAC norms write the formulae for the following: (a) Potassium trioxalatoaluminate (III) (b) Dichloridobis(ethane-l, 2-diamine) cobalt (III) -Chemistry

Last Answer : (a) K3[Al(C2O4)3] (b) [Co(Cl)2(en)2]+

Using IUPAC norms write the formulae for the following: (a) Tris(ethane-1,2-diamine) chromium (III) chloride (b) Potassium tetrahydroxozincate(II) -Chemistry

Description : Using IUPAC norms write the formulae for the following: (a) Tris(ethane-1,2-diamine) chromium (III) chloride (b) Potassium tetrahydroxozincate(II) -Chemistry

Last Answer : a) [Cr(en)3] Cl3 (b) K2[Zn(OH)4]