A cistern is provided with two pipes A a

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Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Topic

Pipes and Cisterns

Question:

A cistern is provided with two pipes A and B. A can fill it in 20 minutes and B can empty it in 30 minutes. How soon will the cistern be filled?

Options:

120

Correct Answer:

Explanation:

Time taken when A and B work together = $\frac{60}{1}$ = 60

The tank will be full in 60 minutes.