A's 1 day's work = 1/15
B's 1 day's work = 1/20
(A + B)'s 1 day's work = ( (1/15) + (1/20) ) = 7/60
(A + B)'s 4 day's work = ( (7/60) x 4 ) = 7/15
Therefore, Remaining work = ( 1 - (7/15) ) = 8/15
A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:
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 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 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?