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Three pipes, A, B, C can fill an empty c...

Three pipes, A, B, C can fill an empty cistern in 2, 3 and 6 hours respectively. They are opened together. After what time should B be closed, so that the cistern gets filled in exactly 1 hr 15 min?

A

30 min

B

15 min

C

20 min

D

45 min

Text Solution

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The correct Answer is:
A
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GAGAN PRATAP -PIPE & CISTERN-MULTIPLE CHOICE QUESTION
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