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CSS General Ability 2019 Q(6b) Solved | One Pipe Can Fill Pool 1.25 Times

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Recommended: CSS General Ability 2019 Solved Q (6a) And Q (6c)

Explanation

There are two pipes that fills the pool but speed of efflux of one pipe is 1.25 times the other. When both pipes are used, they take 5 hours to fill the entire pool.

To Find

Time taken by the slower pipe, if only the slower pipe is used to fill the pool = ?

Illustration

Suppose Ali and Saif challenge each other to run the 50km race. The speed of Saif is double as compared to Ali. If Ali finishes it in 10 hours then how long do you think Saif should have taken?

5 Hours

What you did here? Actually, you simply divided 10 over 2 because speed of Saif is double as compared to Ali. In the same way, to solve this problem we will consider (x) the time taken by the slower pipe and divided it over 1.25 for the time taken (x/1.25) by the faster pipe.

Solution

Let,

Time taken by the slower pipe = x

So, the time taken by the faster pipe = x/1.25

Time taken by the both pipe to fill the entire pool = 5 hours

Now, according to the given condition

Solved-one-pipe-can-fill-a-pool-1.25-times-as-fast-as-a-second-pipe-when-both-pipes-are-opened-they-fill-the-pool-in-five-hours-how-long-would-it take-to-fill-the-pool-if-only-the-slower-pipe-is-used

Conclusion

So, slower pipe would take 11.25 hours to fill the pool.

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