SOLUTION: Harry drove for 2 hours on the​ freeway, then decreased his speed by 20 miles per hour and drove for 2 more hours on a country road. If his total trip was 228 ​miles, t
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-> SOLUTION: Harry drove for 2 hours on the​ freeway, then decreased his speed by 20 miles per hour and drove for 2 more hours on a country road. If his total trip was 228 ​miles, t
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Question 1095857: Harry drove for 2 hours on the freeway, then decreased his speed by 20 miles per hour and drove for 2 more hours on a country road. If his total trip was 228 miles, then what was his speed on the freeway? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! distance=velocity* time
speed on freeway is x
distance on freeway is 2x
speed on country road is x-20
distance on country road is 2(x-20)=2x-40
That sum is 228
therefore, 4x-40=228
4x=268
x=67 mph speed on the freeway
In 2 hours, 134 miles
x-20 is 47 mph; in 2 hours, 94 miles
That sum is 228 miles.
