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On pipe P is 4 times faster than pipe Q and takes 45 minutes less than pipe Q. In what time the cistern is full if both the pipes are opened together?
  • a)
    8 minutes
  • b)
    10 minutes
  • c)
    12 minutes
  • d)
    14 minutes
  • e)
    None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
On pipe P is 4 times faster than pipe Q and takes 45 minutes less than...
Let P takes x minutes to fill the tank alone, then Q will take 4x minutes to fill the tank
4x – x = 45, x = 15
So P will take 15 minutes and Q will take 60 minutes to fill the tank. Both will fill the tank in
(60*15)/(75) = 12 minutes
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Most Upvoted Answer
On pipe P is 4 times faster than pipe Q and takes 45 minutes less than...
Let P takes x minutes to fill the tank alone, then Q will take 4x minutes to fill the tank
4x – x = 45, x = 15
So P will take 15 minutes and Q will take 60 minutes to fill the tank. Both will fill the tank in
(60*15)/(75) = 12 minutes
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Community Answer
On pipe P is 4 times faster than pipe Q and takes 45 minutes less than...
Let P takes x minutes to fill the tank alone, then Q will take 4x minutes to fill the tank
4x – x = 45, x = 15
So P will take 15 minutes and Q will take 60 minutes to fill the tank. Both will fill the tank in
(60*15)/(75) = 12 minutes
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On pipe P is 4 times faster than pipe Q and takes 45 minutes less than pipe Q. In what time the cistern is full if both the pipes are opened together?a)8 minutesb)10 minutesc)12 minutesd)14 minutese)None of theseCorrect answer is option 'C'. Can you explain this answer?
Question Description
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