Raju and Pintu together can clean a garden in 10 hours.
If Raju alone can do it in 15 hours, how many hours will Pintu alone take?
Show answer & explanation
Correct answer: B
Explanation
Raju + Pintu = 10 hours
Raju = 15 hours
(R + P) = 1/10
R = 1/15
⇒ P = 1/10 − 1/15
= (3 − 2)/30
= 1/30
⇒ Time = 30 hours