Monday, 21 July 2014

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

Options:
A.     23 days        B.     37 days    C.    D.37.5      40 days




Answer: C


Explanation: 

A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:

 A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:

Options:
A.     25 days        B.     10 days
C.     5 days           D.     34 days



Answer:  A

Explanation: 

A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?

 A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?

Options:
A.     12 hours        B.     15 hours
C.     9 hours            D.     19 hours



Answer:  A

Explanation: 

If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:

If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:

Options:
A.     4 days    B.     11 days
C.     5 days    D.     6 days


Answer:  A

Explanation: 

A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?

A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?

Options:
A.     Rs. 325    B.     Rs. 400
C.     Rs. 200    D.     Rs. 450





Answer:B

Explanation:

A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:

A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in: 

Options:
A. 20 days     B. 22.5    C. 25 days   D. 30 days




Answer:  B

Explanation: 

A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day? 

Options:
A.     14 days    B.     15 days
C.     18 days    D.     19 days



Answer:  B

Explanation: