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06-10-2018
Physics

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The cunninghams are moving across the country. Mr.cunningham leaves 2.5 hours before mrs.cunningham. If he averages 40 mph and she averages 65 mph,how long will it take Mrs.cunningham to overtake mr.cunningham?

Respuesta :

06-10-2018

When she starts out, he is (40x2.5)= 100 miles ahead of her.

She gains (65-40)= 25 miles on him every hour.

It takes her (100/25)= 4 hours to catch up to him.

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