SOLUTION: A boy walked 10 kilometers. He returned in a car at the rate of 30 kilometers an hour. He was gone for 4 hours. What was his rate while walking?

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Question 184850: A boy walked 10 kilometers. He returned in a car at the rate of 30 kilometers an hour. He was gone for 4 hours. What was his rate while walking?
Found 2 solutions by solver91311, josmiceli:
Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website!

Use the formula for distance in terms of rate and time:

If he returned 10 km at 30 km/hr then his time for the return trip must have been:

If his total travel time was 4 hours, then his walking time must be 4 hours minus his travel time in the car, so:

So his 10 km trip took

Using the formula again, this time looking for rate in terms of distance and time:

John

Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website!
For walking:

For driving:

given:
km
km
hrs
km/hr
------------------------

and

hr

km/hr answer
check answer:

close enough