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) 12 days	B) 5 days	C) 9 3/8 days	D) 8 days	E) 6 days
Explanation:   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?