Question

Blake's car has traveled 100 miles in 1 1/4 hours. How many miles per hour is Blake's car traveling?

Answer 1

80 miles per hour

Explanation:

The unit rate in this problem is 1 hour.

To find the unit rate, we have to find a factor for 1 hour and 1
`(1)/(4\\)` hours.

A common factor would be
`(1)/(4\\)` of an hour. Since
`(1)/(4\\)` is 1
`(1)/(4\\)` divided by 5, we also have to divide 100 miles by 5, which is 20.

So now we have that Blake's car can travel 20 miles in
`(1)/(4\\)` of an hour.

We want to know how many miles it can travel in 1 hour. If we multiply
`(1)/(4\\)` by 4, we get one hour. Likewise, we multiply 20 miles by 4 to get 80 miles travel in one hour.