Asked by Bob
After eating lunch together, Jay and Paul start walking in opposite directions. Jay walks 0.75 miles every 15 minutes and Paul power walks 2.5 miles every 30 minutes. In miles, how far apart are they after 1.5 hours?
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Answered by
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Jay's speed = 0.75 miles per 15 min = 0.75 / 0.25 = 3 mph.
Paul's speed = 2.5 miles per 30 min = 2.5 / 0.5 = 5 mph.
After 1.5 hours, Jay goes 3(1.5)=4.5 miles and Paul goes 5(1.5)=7.5 miles.
They walk opposite ways, so separation = 4.5+7.5 = 12 miles.
Paul's speed = 2.5 miles per 30 min = 2.5 / 0.5 = 5 mph.
After 1.5 hours, Jay goes 3(1.5)=4.5 miles and Paul goes 5(1.5)=7.5 miles.
They walk opposite ways, so separation = 4.5+7.5 = 12 miles.
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