A refrigerated truck leaves a rest stop traveling at a steady rate of 56 mi/h. A car leaves the same rest stop 1/4 hours later following the truck at a steady rate of 64 mi/h. How long after the truck leaves the rest stop will the ca overtake the truck?

Answer 1

When the car starts, the truck is 56/4 = 14 miles ahead.
the car is going 8 mi/hr faster.
So, how long will it take to make up the 14 miles?
Add that to the 1/4 hr the truck already traveled.