## Mowing the lawn (Solution)

\[\frac{15}{8}\]Joe can mow \(\frac{1}{3}\) of the lawn per hour. Bob can mow \(\frac{1}{5}\) per hour. Together they can mow \(\frac{8}{15}\) per hour. So it will take them \(\frac{15}{8}\) hours to mow the lawn.

Joe can mow \(\frac{1}{3}\) of the lawn per hour. Bob can mow \(\frac{1}{5}\) per hour. Together they can mow \(\frac{8}{15}\) per hour. So it will take them \(\frac{15}{8}\) hours to mow the lawn.