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Question

A rectangular tank is 80 m long and 25 m broad. Water-flows into it through a pipe whose cross-section is 25 cm2, at the rate of 16 km per hour. How much the level of the water rises in the tank in 45 minutes.


Solution

Length of tank (l) = 80 m

Breadth (b)  = 25 m

Area of cross section of the month of pipe = 25 cm2

and speed of water-flow = 16 km/h

 Volume of water in 45 minutes

=16×34×1000×2510000m3

=12×2510=30010=30 m3

 Level of water in the tank

=Volume of waterArea of tank

=3080×25m=3200m

=3200×100 cm=1.5 cm

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