Anil can do a work in 15 days while Sunil can do it in 25 days. How long will they take if both work together?
Options:
(A) 9 3/8 days
(B) 4 2/8 days
(C) 17 9/8 days
(D) 12 7/8 days
(E) 16 9/8 days OK. Let's think. Some random thoughts first:
1/15 + 1/25 = 8/75
75/8 = 9 3/8 days The answer: (A).