search
Q: Two pipes can fill a tank in 15 hours and 4 hours, respectively, while a third pipe can empty it in 12 hours. How long (in hours) will it take to fill the empty tank if all the three pipes are opened simultaneously?
  • A.
    option image
  • B.
    option image
  • C.
    option image
  • D.
    option image
Correct Answer: Option C -
answer image

Explanations:

explanation image