SOLUTION: How do I solve?
A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took three hours less time. Find the speed going.
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-> SOLUTION: How do I solve?
A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took three hours less time. Find the speed going.
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Question 141559: How do I solve?
A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took three hours less time. Find the speed going. Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! How do I solve?
:
Let x = speed going
then
2x = return speed
:
A person traveled 120 miles in one direction. The return trip was accomplished at double the speed and took three hours less time. Find the speed going.
;
Write a time equation: Time = dist/speed
:
Going time = return time + 3 hrs = + 3
Multiply equation by 2x to get rid of the denominator:
2(120) = 120 + 3(2x)
:
240 = 120 + 6x
:
240 - 120 = 6x
:
120 = 6x
x =
x = 20 mph is the go speed
:
:
Check solution by finding the times
120/20 = 6 hrs
120/40 = 3 hrs
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differ = 3 hrs
