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Q.

One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in Question Imageminutes, then the slower pipe alone will be able to fill the tank in.


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a

Question Image min

b

Question Image min

c

Question Image

d

Question Image 

answer is C.

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Detailed Solution

Concept: Unitary method is a way of solving these kinds of equations.
Assume Question Image is the time taken by slower pipe to fill the tank, faster will fill in Question Image minutes
Then, according to the question, we can write
Question Image(1)
Question Image(2)
Question ImageThe slower pipe will fill in Question Image min.
Hence, the correct answer is option (3) .
 
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