Question

At 5pm, Li rented bikes from Pearl's

Wheels. She returned the bike at 11pm, after
riding 38 miles: Li paid $26.00 for the
rentals
a. What was her average speed in miles per hour?
b. What was her cost per hour, to the nearest cent?
c. What was her cost per mile, to the nearest cent?

Answer 1

(a) 6.33 miles per hour

(b) $4.33 per hour

(c) $0.68 per mile

Explanation:

Li drove 6 hours (5pm - 11pm) for a total of 38 miles

`\textrm{(a) Her average speed is determined by the formula}\\\\\frac{\textrm{Distance Travelled}}{\textrm{Time taken for travel}}`

`\textrm{So average speed }=$(38)/(6) = 6.33$ \;\textrm{miles per hour}}\\\\`

(b) She paid $26 for 6 hours of usage

`\textrm{So cost per hour } = (26)/(6) = \$4.33\;\textrm{per hour}\\\\`

(c) Cost per mile, c, can be computed as follows

`c = \frac{\textrm{Total Cost}}{\textrm{Miles Traveled}}`

`\longrightarrow (26)/(38) = \$0.68\; \textrm{per mile}`