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

6 litres

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10 litres

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9 litres

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15 litres

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Solution

The correct option is C
9 litres

Area of cross section = 5 $c m^{2}$

speed of water = 30cm/s

Volume of water flowing out = area of cross section x speed of water

= 50 x 30

= 150 $c m^{3}$ in one second

$∴$ in one minute = 150 x 60 = 9000 $c m^{3}$

= 9 litres $[1 l i t r e = 1000 c m^{3}]$

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

The correct option is C 9 litres Area of cross section = 5 cm2 speed of water = 30cm/s Volume of water flowing out = area of cross section x speed of water = 50 x 30 = 150 cm3 in one second ∴ in one minute = 150 x 60 = 9000 cm3 = 9 litres [1litre = 1000 cm3]

The correct option is C
9 litres

Area of cross section = 5 $c m^{2}$

speed of water = 30cm/s

Volume of water flowing out = area of cross section x speed of water

= 50 x 30

= 150 $c m^{3}$ in one second

$∴$ in one minute = 150 x 60 = 9000 $c m^{3}$

= 9 litres $[1 l i t r e = 1000 c m^{3}]$