Question

Ryan delivers flowers to two customers. He drives for 12 minutes at an average speed of

40 miles per hour to reach his first customer. He then drives for 15 minutes at an average
speed of 50 miles per hour to reach his second customer. During the 27 minutes of driving
time, how many total miles does Ryan drive?

Answer 1

Answer:20.5 miles

Explanation:

the formula for distance, rate (speed), and time is

Distance=rate×time

D=40 (this is the speed he was going for the first customer) ×
`(12)/(60)` (time)

the time is 12/60 because we the speed was in miles per HOUR and the time was in miles per MINUTE. To convert minutes to hours, we divide by 60.

D=40×
`(12)/(60)`

D=48/6

D=8 miles

Second trip:

D= 50×
`(15)/(60)`

D=50×
`(1)/(4)` (15/60 simplified is 1/4)

D= 12.5 miles

ANSWER: 8 miles + 12.5 miles = 20.5 miles