SOLUTION: Jim drove the 120 miles to Grandmother's house in 3 hours. He increased his speed by 10 miles per hour on the way home. How long did it take him to drive home?
"Changing Rates"
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"Changing Rates"
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Question 408948: Jim drove the 120 miles to Grandmother's house in 3 hours. He increased his speed by 10 miles per hour on the way home. How long did it take him to drive home?
"Changing Rates" Answer by solver91311(24713) (Show Source):
To find the rate for the outbound trip, divide the distance by the time. Then add 10 mph to get the rate for the return trip. Divide the distance by this new rate to get the new time.
John
My calculator said it, I believe it, that settles it
