Question

working alone, carlos can oil the lanes in a bowling alley in five hours. Jenny can oil the same lanes in nine hours. If they worked together how long would it take them?

Answer 1

Explanation:

Answer 2

USe the same method as in ur last question

1/5 + 1/9 = 1/x where x is the required time

First step is to multiply through by 45x

then solve for x