<PRE><B>Question 970950</B>
A loaded truck is moving 40mph. faster than a freight train. The truck travels 350 miles in the same time as the train travels 150 miles. Find the speed of the truck.
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let x=speed of freight train
x+40=speed of truck
travel time=distance/speed (equal for truck and train)
..
{{{350/(x+40)=150/x}}}
350x=150(x+40)
350x=150x+6000
200x=6000
x=30
x+40=70
speed of truck= 70 mph
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