Question

Write the proportion and solve:

1. Mr. Lewis rode his bicycle for 5 miles and it took
him 45 minutes. How long will it take him to ride 90
miles?
________. ____

Answer 1

810 minutes

13 hours 30 minutes

Explanation:

Let the unknown value be x

`5\:miles = 45 \: minutes\\90\:miles = x\:minutes`

Sole the proportion for x ; Cross Multiply

`5* \:x =90 * 45\\\\5x\: = 4050`

Divide both sides of the equation by 5

`(5x)/(5) = (4050)/(5) \\\\x = 810 \:minutes =\\13 \:hours \:30\:minutes`