3 hours to Cambridge
45 miles at 20 mph = 2.25 hours
Martin rides to Cambridge 30 miles away from home at the average rate of 10 miles per hour.He returns on a better road that is 50% longer where he can increase his rate by 100%.How much time does he save by
taking the better road on his return trip?
a. 2 1/4 minutes
b. 15 minutes
c. 45 minutes
d. 2 hours 15 minutes
e. 2 hours 45 minutes
please answer and explain
1 answer
1 answer