Question

A takes twice as much time as B and thrice as much as C to complete a piece of work. They together complete the work in 1 day. In what time, will A alone complete the work.

• A. 9 days
• B. 5 days
• C. 6 days
• D. 4 days

Answer 1

Answer:

C. 6 days

time taken by A : time taken by B = 2 : 1 time taken by A : time taken by C = 3 : 1 Ratio of time taken to do the work A : B : C = 6 : 3 : 2 efficiency of A : B : C = 6 : 12 : 18 = 1 : 2 : 3 total work = (1 +2+ 3)1 = 6 time taken by A alone to complete the work = 6/1 = 6 days