Monday, February 12, 2007

"MATH QUESTION OF THE DAY"

An empty swimming pool can be filled to capacity through an inlet pipe in 3 hours, and it can be completely drained by a drainpipe in 6 hours. If both pipes are fully open at the same time, in how many hours will the empty pool be filled to capacity?
  1. 4
  2. 4.5
  3. 5
  4. 5.5
  5. 6
at

3 comments:

  1. AnonymousFebruary 12, 2007 at 2:03 PM

    suppose the vol of the tank be V litres.

    suppose the tank gets completely filled in t hrs.

    according to ques,

    rate at which tank is filling=V/3 litr/hr.

    rate at which tank is getting empty=V/6 litr/hr.

    hence,

    (V/3-V/6)*t=V
    =>t=6hrs.ans

    ReplyDelete
  2. AnonymousFebruary 12, 2007 at 9:11 PM

    ans is E

    ReplyDelete
  3. UnknownFebruary 13, 2007 at 2:37 AM

    e

    ReplyDelete