Question

An object travels 35 miles in one-half hour. What is its speed in miles per hour?

Answer 1

Answer: 70 miles per hour

Step-by-step explanation: Use a proportion like this

35 X

—- = —-

30 60

30X=2100

x=70

Answer 2

70

Explanation:

Multiply the speed in one half hour by two, this will give you the hourly rate of speed. 35(2)=70