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Question

Water flows into a tank 200 m × 150 m through a rectangular pipe 1.5m×1.25 m at the rate of 20 km per hour In what time will the water rise by 2 metres?

A
76 min
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B
80 min
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C
90 min
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D
96 min
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Solution

The correct option is D 96 min
Volume of the tank=200×150×2=60000m3
Length of water column flow in 1 min=20×100060=10003m
Volume of water flown per minute=1.5×1.25×10003=625m3/min
Time required to rise the water by 2m=60000625=96min

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