Question

A concrete worker is laying concrete along a 120-foot king driveway at a constant rate .After 6 hours .the worker still has 30 feet yo finish the project .How time does in take to complete the driveway from start to finish ?

Answer 1

After 6 hours: 120 feet - 30 feet left = 90 feet completed

120 feet ÷ 90 feet/6 hours =

120 feet ÷ 15 feet/hour = 8 hours