A cistern is normally filled in 8 hrs., but takes 2 hrs. longer to fill because of a leak on its bottom, if Cistern is full, how much time cistern would empty?
50 hrs.
45 hrs.
40 hrs.
35 hrs.
Explanation:
If leakage/hour=1/x, then 1/8 -1/x= 1/10, solving 1/x=1/40.
So in 40 hours full cistern will be empty.