Ravi can do a piece of work in 15 days while Prakash can do it in 6 days. In how many days will they finish it together?
Options:
(A) 5 7/9 days
(B) 6 7/9 days
(C) 5 1/9 days
(D) 5 7/2 days
(E) 4 2/7 days Think first, then make a decision. Some random thoughts:
1/15 + 1/6 = 7/30
30/7 = 4 2/7 days So the answer is (E).