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Question

Two water taps together can fill a tank in 938 hours. The tap of larger diameter takes 10 hours less than the smaller one to fill the tank separately. Find the time in which each tap can separately fill the tank.

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Solution

Let the first water tape takes x hours to fill the tank. Then the second water tape will takes hours to fill the tank.

Since, the faster water tape takes x hours to fill the tank.

Therefore, portion of the tank filled by the faster water tape in one hour

So, portion of the tank filled by the faster water tape in hours

Similarly,

Portion of the tank filled by the slower water tape in hours

It is given that the tank is filled in hours.

So,

But, cannot be negative.

Therefore, when then

Hence, the first water tape will takes to fill the tank, and the second water tape will takes to fill the tank.


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