How many litres of water flow out of a pipe of cross section area 5 $c m^{2}$ in 1 minute , if the speed of the water in the pipe is 30 cm/s?

9

litres

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8

litres

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7

litres

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None of the above

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Solution

The correct option is A $9$ litres
Speed of water $= 30 c m / s$ ;
Area of pipe $= 5 c m^{2}$ ;

Volume flowing per unit time $= 30 c m / s \times 5 c m^{2} = 150 c m^{3} / s$
$1 L i t r e = 1000 c m^{3}$

Volume flowing per unit time $= 0.15 L i t r e / s e c$

In 1 minute water that will flow $= 0.15 \times 60 L i t r e s$
$= 9 L i t r e s$

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How many litres of water flow out of a pipe of cross section area 5cm2 in 1 minute , if the speed of the water in the pipe is 30 cm/s?

The correct option is A 9 litresSpeed of water =30 cm/s ;Area of pipe =5 cm2;Volume flowing per unit time =30 cm/s×5 cm2=150 cm3/s1 Litre=1000 cm3Volume flowing per unit time =0.15 Litre/sec In 1 minute water that will flow=0.15 ×60 Litres=9 Litres

How many litres of water flow out of a pipe of cross section area 5 $c m^{2}$ in 1 minute , if the speed of the water in the pipe is 30 cm/s?