8 am Rich left home to walk 5 miles to a friend’s house. After visiting his friend for 1 hour, Richard’s wife
8 am Rich left home to walk 5 miles to a friend’s house. After visiting his friend for 1 hour, Richard’s wife picked him up and drove home at a speed of 30 miles per hour. They arrived home at 10:25 am. What was Rich’s speed walking to his friend’s house?
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At 30 mph it takes 10 minutes to go 5 miles. So subtracting an hour and ten minutes from 10:25, Richard got there at 9:15. That’s 1 1/4 hours walking. Divide 5 miles by 1 1/4 hours and you get 4 miles per hour.
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I think it’s 15 mph
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fast enough to be on time
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