The water in a rectangular reservoir having a base 80m by 60m is 6.5m deep.In what time can the water be amplified by a pipe of which the cross section is a square of a side 20cm if the water runs through the pipe at the rate of 15km per hour?
Options:
A . 26hours
B . 42hours
C . 52hours
D . 65hours
Answer: Option C
Volume of water in the reserviour =(80 x 60 x 13/2)m3 = 31200 m3 Volume of water flow in 1 hour = (15 x 1000 x 20/100 x 20/100)m3 = 600m3 Time taken =(31200/600)hrs = 52 hrs
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