Carl and his dad I stonecarvers. Carl can cut the stone in five days. With his father''s help he can carve it in two days. How long would take his father to carve it alone.
Bob can paint the car ineight hours. Sal can paint the same car in six hours. They start to paint te car together. After 2 hours bob leaves and sal finishes painting alone. How long did it take sal?
Kevin and jack are linemen. Kevin can string 10 miles in 3 days, while both together can string in 1 day. How long does it take jack to string alone?