A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in?	Choose the correct choice from the following choices.
A) 33 B) 88 C) 40 D) 99 E) 11
1/8 - 1/x = 1/10   x = 40   Answer: 40
<result>C</result>
A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in?