Question

Pipe M and N running together can fill a cistern in 6 minutes. If M takes 5 minutes less than N to fill the cistern, then the time in which N alone can fill the cistern will be ..?????
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Answer 1

Explanation: Let pipe M fills the cistern in x minutes.

Therefore, pipe N will fill the cistern in (x+5) minutes.

Now, 1/x + 1/(x+5) = 1/6 → x = 10

Thus, the pipe M can fill in 10 minutes, so N can fill in 10+5 =15 minutes.

Answer 2

Answer:

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Step-by-step explanation:

=> Let pipe M fills the cistern in x minutes.

=> Therefore,

pipe N will fill the cistern in (x+5) minutes.

=> Now, 1/x + 1/(x+5) = 1/6 →

x = 10

Thus, the pipe M can fill in 10 minutes,

so N can fill in 10+5 =15 minutes.

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