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When fritz drives to work his trip takes 30 ​minutes, but when he takes the train it takes 20 minutes. find the distance fritz travels to work if the train travels an average of 12 miles per hour faster than his driving. assume that the train travels the same distance as the car. fritz travels nothing miles to work?

Respuesta :

jorel1380
Let n be Fritzs' car speed, and n+12 be the speed of the train. Then:
1/2 (n)=1/3 (n+12)
2n+24=3n
n=24 mph
n+12=36 mph
Fritz travels 12 miles to work.
30 min @24mph=12 miles
20 min @36mph=12 miles
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