Alexandria09186 Alexandria09186

06-12-2017
Mathematics

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A car averages 2 miles per hour faster than a trolley. If the car travels 190 miles in the same time it takes the trolley to travel 180 miles, then what is the speed of each?

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musiclover10045 musiclover10045

06-12-2017

S = speed

180/s = 190 /s+2

180(s+2) = 190s

180s +360 = 190s

360 = 10s

s = 360/10 = 36

Trolley is 36 miles per hour

Car = 38 miles per hour

check: trolley: 180/36 = 5 hours, car: 19/38 = 5 hours

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