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Inverse Proportion

6 pipes can f...

Question

6 pipes can fill a tank in 4 hours. How many more pipes will be required to fill the same tank in 1 hour?

A

24

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B

12

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C

18

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D

20

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Solution

The correct option is C
18

More pipes, less time

This is an inverse proportion question.

Let the number of required pipes = x

x = 6 $\times$ 4 = 24

24 - 6 = 18 more pipes are required to fill the tank in 1 hour.

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