book Maths Puzzle Numerical Ability

A swimming pool can be filled in 6 h and requires 9 h to drain. If the drain was accidentally left open for 6 h while the pool was being filled, how long did filling the pool require?

Read Solution (Total 0)

book Other Question

this is a practice problem for a placement test for college. I have the answer but I dont understand how they got it. Help Please! 7x-8(y-x)+3y= 5(3x-y) A 50-gallon barrel of milk is 6% butterfat. How much skim milk (no butterfat) should be mixed to make milk that is 3% butterfat?