Question

On a bike trip, Erika rides 5 miles in the first 30 minutes and 13 miles in the next hour. What is her average rate of speed?

Answer 1

Her average speed was 12 miles per hour. Total distance over total time.

Answer 2

12 miles per hour

Explanation:

Speed is the ratio of distance travelled to the time used.

The total distance covered = (5 + 13) miles

= 18 miles

The whole journey took 1 hour + 30 minutes = 1.5 hours

Average rate of speed =
`(total distance covered)/(total time taken)`

=
`(18 miles)/(1.5 hours)`

= 12 miles per hour

Therefore, her average rate of speed is 12 miles per hour.