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.
A9 days
B5 days
C6 days
D4 days
Answer:
C. 6 days
Explanation:
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