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Q: Two pipes A and B, can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opened together but after 4 minutes pipe A is turned off. What is the total time required to fill the tank ?
  • A. 10m 40sec/10 मिनट 40 सेकंड
  • B. 11m 45sec/11 मिनट 45 सेकंड
  • C. 12m 30sec/12 मिनट 30 सेकंड
  • D. 14m 40sec/14 मिनट 40 सेकंड
Correct Answer: Option D -
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Explanations:

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