A and B complete a work in 15 days. B alone takes 25 days. In how many days will A alone complete the work?
Show answer & explanation
Correct answer: A
Explanation
Combined 1-day work efficiency of A and B = 1/15
B's 1-day work efficiency = 1/25
Therefore, A's 1-day work efficiency = 1/15 - 1/25
= (5 - 3)/75
= 2/75
So, A alone will complete the work in = 75/2 days
= 37.5 days