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Q.

Pipe A and B running together can fill a cistern in 6 minutes. If B takes 5 minutes more than A to fill the cistern then the times in which A and B will fill the cistern separately will be, respectively:

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a

15 min, 20 min

b

15 min,10 min

c

10 min, 15 min

d

25 min, 20 min

answer is C.

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Detailed Solution

Let pipe A fills the cistern in x minutes. 

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

Now,

1x+1x+5=16 x=10

Thus, the pipes A and B can fill the cistern in 10 minutes and 15 minutes, respectively

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