Directions for Question : A set of 10 pipes (set X) can fill 70% of a tank in 7 minutes. Another set of 5 pipes (set Y) fills 3/8 of the tank in 3 minutes. A third set of 8 pipes (set Z) can empty 5/10 of the tank in 10 minutes.
Q. If only half the pipes of set X are closed and only half the pipes of set Y are open and all other pipes are open, how long will it take to fill 49% of the tank?
  • a)
    16 minutes
  • b)
    13 minutes
  • c)
    7 minutes
  • d)
    None of these
Correct answer is option 'D'. Can you explain this answer?

CAT Question

Shakuntla Devi
Dec 09, 2020
►Set X will do 5% per minute and Set Y will do 6.25% per minute, while set Z will do 5% per minute (negative work).
►Hence, Net work will be 6.25% per minute. To fill 49% it will take slightly less than eight minutes and the value will be a fraction.
►None of the first three options matches this requirement. 

This discussion on Directions for Question :A set of 10 pipes (set X) can fill 70% of a tank in 7 minutes. Another set of 5 pipes (set Y) fills 3/8 of the tank in 3 minutes. A third set of 8 pipes (set Z) can empty 5/10 of the tank in 10 minutes.Q.If only half the pipes of set X are closed and only half the pipes of set Y are open and all other pipes are open, how long will it take to fill 49% of the tank?a)16 minutesb)13 minutesc)7 minutesd)None of theseCorrect answer is option 'D'. Can you explain this answer? is done on EduRev Study Group by CAT Students. The Questions and Answers of Directions for Question :A set of 10 pipes (set X) can fill 70% of a tank in 7 minutes. Another set of 5 pipes (set Y) fills 3/8 of the tank in 3 minutes. A third set of 8 pipes (set Z) can empty 5/10 of the tank in 10 minutes.Q.If only half the pipes of set X are closed and only half the pipes of set Y are open and all other pipes are open, how long will it take to fill 49% of the tank?a)16 minutesb)13 minutesc)7 minutesd)None of theseCorrect answer is option 'D'. Can you explain this answer? are solved by group of students and teacher of CAT, which is also the largest student community of CAT. If the answer is not available please wait for a while and a community member will probably answer this soon. You can study other questions, MCQs, videos and tests for CAT on EduRev and even discuss your questions like Directions for Question :A set of 10 pipes (set X) can fill 70% of a tank in 7 minutes. Another set of 5 pipes (set Y) fills 3/8 of the tank in 3 minutes. A third set of 8 pipes (set Z) can empty 5/10 of the tank in 10 minutes.Q.If only half the pipes of set X are closed and only half the pipes of set Y are open and all other pipes are open, how long will it take to fill 49% of the tank?a)16 minutesb)13 minutesc)7 minutesd)None of theseCorrect answer is option 'D'. Can you explain this answer? over here on EduRev! Apart from being the largest CAT community, EduRev has the largest solved Question bank for CAT.