SOLUTION: Angela is driving a Ferrari along the interstate at a constant speed of 55mph. A Volkswagon one-half mile behind her that is moving at a constant speed passed her in 90 seconds. Ho
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Question 502789: Angela is driving a Ferrari along the interstate at a constant speed of 55mph. A Volkswagon one-half mile behind her that is moving at a constant speed passed her in 90 seconds. How many miles per hour is the speed of the Volkswagon? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! Angela is driving a Ferrari along the interstate at a constant speed of 55mph.
A Volkswagon one-half mile behind her that is moving at a constant speed passed her in 90 seconds. How many miles per hour is the speed of the Volkswagon?:
:
Let v = the Volkswagon speed
:
Change 90 sec to hrs: 90/3600 = .025 hrs
:
Write a time equation: time = dist/speed
: = .025 hrs
.5 = .025(v-55)
.5 = .025v - 1.375
.5 + 1.375 = .025v
1.875 = .025v
v =
v = 75 mph is the Volkswagon
