Question

Water is flowing through a pipe of diameter 7cm at rate of 4km/h. What is the distance covered by water in the pipe in 6 minutes.

Pls give working also.​

Answer 1

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Surface Areas and Volumes

Volume of Cube, Cuboid and Cylinder

Water flows through a cylin...

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Water flows through a cylindrical pipe of internal diameter 7cm at 5m/s. Calculate:

(i) the volume, in litres, of water discharged by the pipe in 1 minute

(ii) the time, in minutes, the pipe would take to fill an empty rectangular tank 4m by 3m by 2.31m.

HARD

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ANSWER

In one sec. length of water flow in pipe =5m

Radius =

2

7

=3.5cm=0.00355m

Volume of water flow per sec =πr

2

h=π(0.0035)

2

×5

=192.5×10

−6

m

3

Volume of water discharged per minute =192.5×10

−6

m

3

×60

=11.55×10

−3

m

3

=0.01155m

3

=11.55litre

Volume of tank =4×3×2.31=27.72m

3

∵1m

3

=1000litre

Volume of tank =27720litre

Time to fill the tank =

11.55

27720

=2400minutes

=

60

2400

=40hours