Mental Ability MCQs

Pipes and Cisterns Questions with solutions MCQs

1. Two pipes P and Q can fill an empty tank in 20 minutes and 10 minutes respectively. R can empty a full tank in x minutes. If all three pipes are opened simultaneously, tank is full in 12 minutes. The value of x is:

A

18 minutes

B

20 minutes

C

30 minutes

D

15 minutes

Pipes and Cisterns Veterinary Pharmacist 2024
Correct Answer : D
Explanation :

1/20 + 1/10 - 1/x = 1/12 => 3/20 - 1/x = 1/12 => 1/x = 3/20 - 1/12 = 1/15 => x = 15 minutes.

Correct Answered :

Wrong Answered :

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