Question

A mail truck travels 82 miles in 4 1/2 hours.

Answer 1

Average speed = distance / time

Here, distance = 82 miles

time = 4 1/2 hours = 9/2

so, speed = 82*2/9 = 18.22 miles/hour

Answer 2

82 miles / 4.5 hours = 18.2 miles/hour