Water is flowing at the rate of 3 km/hr through a circular pipe of 20 – McqOptions

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1.	Water is flowing at the rate of 3 km/hr through a circular pipe of 20 cm internal diameter into a circular cistern of diameter 10m and depth 2m. In how much time will the cistern be filled?
A.	l hour
B.	1 hour 40 minutes
C.	1 hour 20 minutes
D.	2 hours 40 minutes
Answer» C. 1 hour 20 minutes

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