A pipe can fill a tank in 'a' hours and another pipe can empty it in 'b' hours . If b > a then how much time will it take to fill the tank together by a and b ?
plz help me quickly and explain me ans
and ans is. ab/(b-a)
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Step-by-step explanation:
Let the a = x and b = y
Work done by the pipe filling the tank in 1 hour =x1
Work done by the pipe emptying the tank in 1 hour =y1
Net part of the tank filled in 1 hour =x1−y1=xyy−x
∴ The tank will be filled in (y−xxy) hours.
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