How long will take a leak at the bottom of a tank to empty it if it will take
8 hours to fill it without the leak, but due to the leak it will take 9 hours to be filled?  Choose the correct choice from the following answers:
A) 50 hours	B) 33 hours	C) 72 hours	D) 82 hours	E) 92 hours
Part filled without leak in 1 hour = 1/8   Part filled with leak in 1 hour = 1/9   Work done by leak in 1 hour   =1/8âˆ’1/9=72 hours   Answer:72 hours
<result>C</result>
How long will take a leak at the bottom of a tank to empty it if it will take
8 hours to fill it without the leak, but due to the leak it will take 9 hours to be filled?