SOLUTION: On a trip I drive 4 hours at rate r mph I then drive 6 hours at a rate 40 mph. My total distance is 480 miles. Find r

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Question 218997: On a trip I drive 4 hours at rate r mph I then drive 6 hours at a rate 40 mph. My total distance is 480 miles. Find r

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
On a trip I drive 4 hours at rate r mph I then drive 6 hours at a rate 40 mph.
My total distance is 480 miles. Find r
:
Write a distance equation (dist = time * speed)
;
4r + 6(40) = 480
4r = 480 - 240
4r = 240
r = 60