It took George and Amy a total of 2 hours to put up all the notices for the pet show. They posted notices on trees and bulletin boards around town. All kinds of prizes were to be given, including one for the "ugliest" pet. Amy worked three times as long as George putting up signs. How long did each of them work?

2 answers

If George took x hours, then Amy took 2x hours. So,
1/x + 1/(2x) = 1/2
now just solve for x.
Answer: Amy=90 minutes; George=30 minutes