Question

Water flows at the rate of 7 m/min through a pipe with circular cross section of radius 2 cm. The volume of water which flows out it in 10 minute in litres is

• A. 44 lit
• B. 88 lit
• C. 66 lit
• D. None of the above

Answer 1

Answer: (B)

88 lit

Volume of water flowing out of the pipe = Area of cross section x ratio of flow x time
= $\frac{22}{7}\times \frac{2}{100}\times \frac{2}{100}\times 7\times 10m^3$
= 0.088 $m^3$ = 0.088 x 1000 l = 88 l