A cistern which could be filled in 10 hours takes 2 hour more to be filled owing to a leak in its bottom.If the cistern is full, in what time will the leak empty it?	Choose the correct choice from the following options
A) 50hours	B) 80hours	C) 100hours	D) 150hours	E) 110hours
Let the leak empty the full cistern in x hours   10x/x-10 = 10+1   x = 110 hours   Answer is 110hours
<result>E</result>
A cistern which could be filled in 10 hours takes 2 hour more to be filled owing to a leak in its bottom.If the cistern is full, in what time will the leak empty it?