Question

A car trip took 12 hours. The first half of the trip took 7hrs, @ a rate of 45 miles per hour. What was the average speed on the return trip?

Answer 1

So the distance is 45 * 7 = 315 miles.
And we know that 5 hours are left.

315/5 = 62

So, 62 miles per hour was the average.

Answer 2

^ Speed = distance/time, that's how I got it.

Answer 3

Oops, it's 63 mph