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3 small pumps and a large pump are filli...

3 small pumps and a large pump are filling a tank. Each of the three small pumps works at 2/3rd the rate of the large pump. If all 4 pumps work at the same time, they should fill the tank in what fraction of the time that it would have taken the large pump alone?

A

`4//7`

B

`1//3`

C

`2//3`

D

`3//4`

Text Solution

Verified by Experts

The correct Answer is:
B
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