one pipe can fill a tank three times as fast as another pipe. if together the two pipes can fill the tank in 36 minutes, then time taken by slower pipe to fill the tank in:
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Let's think 2 pipes as x and 3x
=x+3x=36
=4x=36
=x=36/4
X=9
So slower pipe takes 9min time to fill the tank
=x+3x=36
=4x=36
=x=36/4
X=9
So slower pipe takes 9min time to fill the tank
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