Question
Water flows through a cylindrical pipe of internal diameter 7 cm at 2 m per second . If the pipe is always half full , then what is the volume of water (in litres) discharged in 10 minutes ?
Answer: Option C
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Volume of water flown in 1 sec. = `(22/7 xx 7/2 xx 7/2 xx 200) cm^3 = 7700 cm^3`
Volume of water flown in 10 min = ( 7700 x 60 x 10) `cm^3`
= `((7700 xx 60 xx 10)/(1000))` litres = 4620 litres
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