Prabu and balaji are two workers. Working together they can complete the whole work in 20 hours. If the Prabu worked for 5 hours and balaji worked for 17 hours, still there was half of the work to be done. In how many hours Prabu working alone, can complete the whole work? a) 17 hours b) 23 hours c) 34 hours d) 37 hours

Prabu and balaji are two workers. Working together they can complete the whole work in 20 hours. If the Prabu worked for 5 hours and balaji worked for 17 hours, still there was half of the work to be done. In how many hours Prabu working alone, can complete the whole work? a) 17 hours b) 23 hours c) 34 hours d) 37 hours
by

1 Answer

Answer :

C

Efficiency of Prabu and balaji = 5%

Prabu worked for 5 hours and balaji worked separately 17 hours.

Which means it can be considered that Prabu and balaji worked together for 5 hours and balaji worked alone

for 12 hours.

Thus, Prabu and balaji in 5 hours can complete 25% work.

It means the remaining (50 ⎯25) = 25% of the work was done by balaji in 12 hours.

Therefore, balaji can do 100% work in 48 hours.

It means the efficiency of balaji = 2.08%

Therefore, efficiency of prabu = (5-2.08) = 2.92%

Thus, prabu require . = 34 hours to complete the work alone.
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Description : Which of the following statements are correct? I. Rann of Kachchh is formed by the recession of the sea. II. Kuchaman, Sambhar and Didwana are salt water lakes. III. The land to the east of Aravallis is known as Bagar. IV. The ... II and IV (2) I, III and IV (3) II, III and IV (4) I, II, III and IV

Last Answer : (1) I, II and IV

Match List I (Layers of Atmosphere) and List II (Characteristics) and select the correct answer using the code given below. L ist I L i st I I (L ayer of (Char acter ist ics) At mospher e) A. Ionosphere I. Contains Ozone B. Stratosphere II. Reflects radio Waves C. Exosphere III. Fall in Temperature D. Troposphere IV. Extremely low air density (1) A-II, B-III, C-IV, D-I (2) A-II, B-I, C-IV, D-III (3) A-II, B-III, C-I, D-IV (4) A-III, B-I, C-IV, D-II

Description : Match List I (Layers of Atmosphere) and List II (Characteristics) and select the correct answer using the code given below. L ist I L i st I I (L ayer of (Char acter ist ics) At mospher e) A. Ionosphere I. Contains Ozone B. ... D-III (3) A-II, B-III, C-I, D-IV (4) A-III, B-I, C-IV, D-II

Last Answer : 2) A-II, B-I, C-IV, D-III

St at em en t I : The French used forced labour in Indo-China for building canals. St at ement I I : Vietnam became a major exporter of rice in the world

Description : St at em en t I : The French used forced labour in Indo-China for building canals. St at ement I I : Vietnam became a major exporter of rice in the world

Last Answer : 4. Both Statements are true, but Statement II does not provide explanation of Statement I.

St at ement I : The Spanish conquest of America was not a conventional military conquest. St at ement I I : One of the most powerful weapon was the spread of smallpox.

Description : St at ement I : The Spanish conquest of America was not a conventional military conquest. St at ement I I : One of the most powerful weapon was the spread of smallpox.

Last Answer : 3. Both Statements are true, and Statement II provides explanation of Statement I

St at ement I : Mahatma Gandhi wished everyone had clothes to wear. St at emen t I I : He wanted everyone to wear the single loin cloth as he did.

Description : St at ement I : Mahatma Gandhi wished everyone had clothes to wear. St at emen t I I : He wanted everyone to wear the single loin cloth as he did.

Last Answer : I. The Chinese introduced printing.

St at em en t I : Cricket emerged as a colonial game. St at emen t I I : Cricket was started in England. Ans. (3) Sol. Cricket came to India from England as India was a colony

Description : St at em en t I : Cricket emerged as a colonial game. St at emen t I I : Cricket was started in England. Ans. (3) Sol. Cricket came to India from England as India was a colony

Last Answer : III. The Chinese developed printing to facilitate their expanding trade.

St at ement I : Shifting cultivation was widely prevalent in different parts of India in the 19th century. St at ement I I : More and more people took to shifting cultivation when forest laws were enacted.

Description : St at ement I : Shifting cultivation was widely prevalent in different parts of India in the 19th century. St at ement I I : More and more people took to shifting cultivation when forest laws were enacted.

Last Answer : 1. Statement I is true, Statement II is false.

St at ement I : During the years of the Great Depression the economic crisis was worse in Germany. St at em en t I I : The President of the Weimar Republic had the power to impose emergency.

Description : St at ement I : During the years of the Great Depression the economic crisis was worse in Germany. St at em en t I I : The President of the Weimar Republic had the power to impose emergency.

Last Answer : 4. Both Statements are true, but Statement II does not provide explanation of Statement I.

Which of the following statements are correct? I. In the beginning Bombay was under the Portuguese control. II. Control of Bombay passed onto the French in the 17th century. III. The Marathas replaced the French in Bombay. IV. Bombay became the capital of the Presidency in early 19th century. (1) I, II and IV (2) I and IV (3) I, II and III (4) II, III and IV

Description : Which of the following statements are correct? I. In the beginning Bombay was under the Portuguese control. II. Control of Bombay passed onto the French in the 17th century. III. The Marathas replaced the French in Bombay. IV. Bombay ... , II and IV (2) I and IV (3) I, II and III (4) II, III and IV

Last Answer : (2) I and IV