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 citern would empty?
Select
A) 10 hours  B) 20 hours  C) 30 hours  D) 40 hours  E) 50 hours
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.   ANSWER:40 hours
<result>D</result>
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 citern would empty?