A plane flies from St. Louis, MO to Tallahassee, FL at 300...?

Question

A plane flies from St. Louis, MO to Tallahassee, FL at 300 mph. A car drives the same distance, leaves at the same time and drives an average speed of 60 mph. The car arrives in Tallahassee 8.8 hours later than the plane. How far is it from St. Louis to Tallahassee? Use a chart to help you organize the information.

Answer 1

Distance by plane: D = 300*T

Distance by car: D = 60*(T + 8.8)

Equate these:

300^T = 60*(T + 8.8)

300*T = 60*T + 528

240*T = 528

T = 2.2 hours

D = 300*2.2 = 660 miles

The distance is 660 miles