Solve the Problem $11.5 \mathrm{mph}$ Hike $1.5 \mathrm{mph}$ B) Bike $12 \mathrm{mph}$ Hike $2 \mathrm{mph}$

Solve the problem.
-A man rode a bicycle for 12 miles and then hiked an additional 8 miles. The total time for the trip was 5 hours. If his rate when he was riding a bicycle was 10 miles per hour faster than his rate walking, what was each rate?

A) Bike: $11.5 \mathrm{mph}$
Hike: $1.5 \mathrm{mph}$
B) Bike: $12 \mathrm{mph}$
Hike: $2 \mathrm{mph}$
C) Bike: $14.5 \mathrm{mph}$
Hike: $4.5 \mathrm{mph}$
D) Bike: $13 \mathrm{mph}$
Hike: $3 \mathrm{mph}$