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?
Pick one:
A) 3 4/9 days	B) 8 4/9 days	C) 9 3/8 days	D) 6 3/8 days	E) none of these
1/15 + 1/25 = 8/75   75/8 = 9 3/8 days   ANSWER:9 3/8 days
<result>C</result>
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?