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A tap can flll a cistern in 40 minutes a...

A tap can flll a cistern in 40 minutes and a second tap can empty the filled cistem in 60 minutes. By mistake without closing the second tap, the first tap was opened. In how many minutes will the empty cistern be filled ?

A

72

B

84

C

108

D

120

Text Solution

Verified by Experts

The correct Answer is:
D
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KIRAN PUBLICATION-PIPE AND CISTERN -TYPE-III
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