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OpenStudy (anonymous):
Paul drove from his house to work at averge speed of 40 miles per hour.The driver took him 15 minutes . If the drive home took him 20 minutes and he use the same route in rever,what is his average speed going home?
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OpenStudy (dumbcow):
d = r*t d=40(1/4), 15min=1/4 hr d = 10 miles d=r*t 10=1/3 r 30 = r avg speed is 30mph
OpenStudy (anonymous):
thank
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