SOLUTION: A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took 3 hours less time. Find the speed going
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Question 249888: A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took 3 hours less time. Find the speed going
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took 3 hours less time. Find the speed going
:
Let s = original speed
then
2s = return speed
:
Write time equation Time = dist/speed
:
original time - return time = 3 hrs
- = 3
reduce fraction
- = 3
multiply by s
120 - 60 = 3s
:
60 = 3s
s =
s = 20 mph hr is going speed
:
:\
Check the times
120/20 = 6 hr
120/40 = 3 hr
--------------
differ = 3 hrs
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