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Kamaal Akhtar

· started a discussion

· 1 Months ago

Incorrect ans (Question: 326214.0 )

Ans should be 60.

Question:
A swimming pool has 3 drain pipes. The first two pipes A and B, operating simultaneously, can empty the pool in half the time than that of taken by C alone. Pipe A, working alone, takes half the time taken by pipe B. Together they take 6 hrs 40 minutes to empty the pool. Time taken by pipe A to empty the pool, in hours, is:
Options:
A)

10

B)

15

C)

30

D)

7

Solution:

Ans: (b)


Knowledge Expert

· commented

· 1 Months ago

Dear Student,
15 hours is the correct answer
See the Short Solution:
A=2B
3B=2C
A:B:C=4:2:3
Total empty in one minute =9
Then total capacity =9*(6hr 40minute) =9*20/3
A emptied 4 in one minute then total time taken by A=9*(20/3)/4=15hr
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