A cistern is normally filled in 4 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? Choose the correct answer
A) 10 hours	B) 20 hours	C) 30 hours	D) 40 hours	E) 12 hours
If leakage/hour=1/x, then 1/4 -1/x= 1/6, solving 1/x=1/12   So in 12 hours full cistern will be empty.   ANSW12 hoursR:12 hours
<result>E</result>
A cistern is normally filled in 4 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?