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A pipe of radious 1 cm can fill up a tank in 20 minut ;time to taken by another pipe of radious 2 cm to fill ;it will be
9 years ago

Answers

Reiny
basic assumption:
time of filling is inversely proportional to the square of the radius

1^2/2^2 = t/20
4t = 20
t = 5


9 years ago

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