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A tap can fill a cistern in 9 hours. Aft...

A tap can fill a cistern in 9 hours. After one-third of the tank is filled, three more similar taps are opened. What is the total time (in hour) taken to fill the tank completely?

A

1.5

B

2/3

C

4

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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