Question

A commuter train travels59 miles in 45 minutes. What is its speed inmiles per hour?The speed is approximately units per . (Round to the nearest tenth as needed.)

Answer 1

Transform the 45 minutes into hours, as shown below

`(45)/(60)=(3)/(4)=0.75`

Then 45 minutes is equal to 0.75 hours.

Divide the number of miles by the number of hours,

`(59miles)/(0.75hours)=78.666...(miles)/(hours)`

Rounding to the nearest tenth,

`\Rightarrow(59)/(0.75)\approx78.7`

The answer is 78.7 miles per hour, approximately.