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John walked to school at 5 miles per hour in 21 minuets. She jogged him in 7 minutes. What was his average jogging rate on the way home?
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John walked to school at 5 miles per hour in 21 minuets. She jogged him in 7 minutes. What was his average jogging rate on the way home?

User Ronaldwidha
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distance to school = 5 * 21/60 = 1.75 miles.

On way home she jogged 1 75 miles in 7 minutes
So average rate = 1.75 / 7 = 0.25 miles per minute

= 60 * 0.25 = 15 miles per hour
User Samveen
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