SOLUTION: A car traveling at 8o kilometers per hour is passed by a second car going in the same direction at a constant speed. After 30 seconds the two cars are 500 meters apart. Find the sp
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Question 789359: A car traveling at 8o kilometers per hour is passed by a second car going in the same direction at a constant speed. After 30 seconds the two cars are 500 meters apart. Find the speed of the second car. Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! A car traveling at 8o kilometers per hour is passed by a second car going in the same direction at a constant speed. After 30 seconds the two cars are 500 meters apart. Find the speed of the second car.
speed of car II -x mph
speed of car I = 80 kph
Difference = (x-80)
distance between them = 0.5 km
after time (30/3600) hours
d=rt
0.5 = (x-80) * (30/3600)
0.5 * 3600 = 30(x-80)
0.5 * 3600/30 = x-80
60=x-80
x= 80 +60
x= 140 km/h
