SOLUTION: A cylinder pipe has inner diameter of 7cm and water flows through it at the rate of 192.5 litres per minute. Find the speed of water in km/hour

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Question 1020919: A cylinder pipe has inner diameter of 7cm and water flows through it at the rate of 192.5 litres per minute. Find the speed of water in km/hour
Found 2 solutions by robertb, Alan3354:
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Note that L/min = cm%5E3%2Fmin
==> speed of water = (volume speed)/(cross-sectional area of pipe) = %28192.5+%28cm%5E3%2Fmin%29%29%2F%28%2822%2F7%29%283.5%5E2%29%28cm%5E2%29%29+=+5+cm%2Fmin, where we used pi+=+22%2F7
==> speed of water = %285cm%2Fmin%29%281km%2F%28%2810%5E5%29+cm%29%29%2860min%2Fhr%29 = 0.003 kph

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A cylinder pipe has inner diameter of 7cm and water flows through it at the rate of 192.5 litres per minute. Find the speed of water in km/hour
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192.5 liter/min = 192500 cm^3/minute
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Area = pi*r^2 = 12.25pi cm^2
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192500/(12.25*pi) = 770000/(49pi) = 110000/(7pi) cm/minute
= 110/(7pi) km/minute
= 6600/(7pi) km/hr
=~ 300.12 km/hr