Question 21

Two pipes, A and B, can fill a tank in X minutes and 6 minutes, respectively. If both the pipes are used together, then they take 1.5 minute to fill the tank. Find the value of X.

Solution

A takes x min and B takes 6 min , both takes 1.5 min

so,$$\ \frac{\ 1}{x}+\ \frac{\ 1}{6}=\ \frac{\ 1}{1.5}$$

then the value of x=1 min

Hence option 'D' is correct.

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