Q22
A pipe can fill a tank in 3 hours. There are two outlet pipes from the tank which can empty it in 7 and 10 hours respectively. If all the three pipes are opened simultaneously, then the tank will be filled in -
A.
8 hours
B.
9 hours
C.
10 hours
D.
11 hours
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Net part filled in 1 hour∴ The tank will be filled in hours i.e.