Adele is driving her car near the Tri-State area. She covers a distance of 221.05 miles in 4 hours. She then stops at a diner, and drives 83 miles more at the same speed. What would be the best estimate of the time she took to cover this last distance?

A. 2 hours
B. 2.5 hours
C. 1.5 hours

Question

Adele is driving her car near the Tri-State area. She covers a distance of 221.05 miles in 4 hours. She then stops at a diner, and drives 83 miles more at the same speed. What would be the best estimate of the time she took to cover this last distance?

A. 2 hours
 B. 2.5 hours
 C. 1.5 hours

Ferredoxin · Answer

First, calculate the speed she was driving on. 
Speed=distance/time
distance=221.05 miles
Time=4 hours
Units are important
221.05/4
=55.263 mph

Now it says at the same speed she's driving 83 miles more. You can use a proportion to solve this.
55.263 miles/1 hour = 83 miles/ x hours
Cross multiply
83=55.263x
x=1.502

1.502 is closest to option C, 1.5 hrs.

AllisonKookie · Answer

thanks for your help. again!