It is required to fix a pipe such that water flowing through it at a speed of 7

Question

It is required to fix a pipe such that water flowing through it at a speed of 7 metres per minute fills a tank of capacity 440 cubic metres in 10 minutes. The inner radius of the pipe should be :

Options:

A . $$\sqrt 2 \,m$$

B . $$ 2 \,m$$

C . $$\frac{1}{{2 }}\,m$$

D . $$\frac{1}{{\sqrt 2 }}\,m$$

Answer: Option A

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