Question

A car traveled 990 feet down a road in 15 seconds. How many miles per

hour was the car traveling?

Answer 1

45 miles per hour.

Explanation:

A car travelled 990 feet in 15 seconds.

1 mile = 5280 feet

? miles = 990 feet

Cross multiplying gives;

`(990)/(5280)` miles

1 hr = 3600 seconds

? hrs = 15 seconds

Cross multiplying gives;

`(15)/(3600)` hrs

Speed = Distance travelled ÷ time

Speed (in miles per hour) =
`(990)/(5280)` miles ÷
`(15)/(3600)` hrs

=
`(990)/(5280)` miles ×
`(3600)/(15)` miles = 45 miles per hour