Question

A road sign gives drivers information about traffic on busy highways. One sign shows "15 miles in 20 minutes." What is the speed in miles per hour?

Answer 1

45

Explanation:

1 hour = 60 minutes

15 / 20 = x / 60

solve for x

15*3 / 20*3 = x / 60

45 / 60 = x / 60

denominators cancel

x = 45