Water flowing at the rate of 10 km/hr through a pipe of radius 14 cm into a rectangular tank which is 200 m long and 88 m wide. In what time the water level will rise by 28 cm.

Let time taken to increase the level of tank by 28 m = n hours. The volume of pipe contains the water, has speed of water = Height of pipe. Volume of Pipe = 22/7 × (14/100)^2× 10000 Volume of pipe × n = 100 × 88 × 28/100 22/7 × (14/100)^2× 10000 × n = 100 × 88 ×28/100 n = 8 hrs.

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