Question

Water flows into a tank which is 200m long and 120 m wide, through a pipe of cross- section 0.3 m × 0.2 m at 20 km/hr. then the time ( in hr) for the water level in the tank to reach 9 m is ?

A 150 hrs
B 120 hrs
C 180 hrs
D 210 hrs
E None of these
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