Question

12. How many litres of water flows out of a pipe in 1 hour having an area of cross-section 5 cm, if the
speed of water is 30 cm/s?
​

Answer 1

Speed of water =30 cm/s ;

Area of pipe =5 cm

2

;

Volume flowing per unit time =30 cm/s×5 cm

2

=150 cm

3

/s

1 Litre=1000 cm

3

Volume flowing per unit time =0.15 Litre/sec

In 1 minute water that will flow=0.15 ×60 Litres

=9 Litres

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