SOLUTION: If a car leaves a city and drives 50 mph and two hours later a truck leaves the same city going the same way at 70 mph how long will it take the truck to catch the car

Question 828437: If a car leaves a city and drives 50 mph and two hours later a truck leaves the same city going the same way at 70 mph how long will it take the truck to catch the car
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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s = d/t
t = d/s
d = t*s
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head start:
d = 2*50
d = 100 miles
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relative speed:
s = 70 - 50
s = 20 mph
---
time to over take:
t = 100/20
t = 5 hours
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