SOLUTION: A truck travels 400 miles through flat lands in the same amount of time it travels 200 miles through mountains. The rate of the truck is 10 miles slower in the mountains that in th
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Question 443817: A truck travels 400 miles through flat lands in the same amount of time it travels 200 miles through mountains. The rate of the truck is 10 miles slower in the mountains that in the flat lands. Find the rate in the flat lands and the mountains.
Answer by rwm(914) (Show Source): You can put this solution on YOUR website!
r*t=400
(r-10)*t=200
2 *(r-10)*t=r*t
2t(r-10)=rt
divide by t
2r-20=r
r=20 on the flat
r-10=10 in the mountains
20*20=400
10*20=200
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