Through pipe A, 8 litres of water flows in 4 minutes and through pipe B, 21 litres 7 minutes. The ratio between the flow rates in pipes A and B is

8:21

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21:8

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2:3

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3:2

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Solution

The correct option is C 2:3
$Flow rate of pipe A:$
$= V o l u m e o f w a t e r \div T i m e t a k e n = 8 L \div 4 min = 2 L/min$

$Flow rate of pipe B:$
$= V o l u m e o f w a t e r \div T i m e t a k e n = 21 L \div 7 min = 3 L/min$

$⟹ \frac{F l o w r a t e o f p i p e A}{F l o w r a t e o f p i p e B} = \frac{2}{3}$

$∴ The ratio between the flow rates in$ $pipes A and B is 2:3.$

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Through pipe A, 8 litres of water flows in 4 minutes and through pipe B, 21 litres 7 minutes. The ratio between the flow rates in pipes A and B is

The correct option is C 2:3Flow rate of pipe A: =Volume of water÷Time taken=8 L÷4 min=2 L/min Flow rate of pipe B: =Volume of water÷Time taken=21 L÷7 min=3 L/min ⟹Flow rate of pipe AFlow rate of pipe B=23 ∴The ratio between the flow rates in pipes A and B is 2:3.