SOLUTION: Students are traveling in two cars to a football game 145 miles away. One car travels at an average speed of 40 miles per hour. The second car starts a half hour later and travels

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Question 994507: Students are traveling in two cars to a football game 145 miles away. One car travels at an average speed of 40 miles per hour. The second car starts a half hour later and travels at an average speed of 50 miles per hour. How long will it take the second car to catch up to the first car?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
CAR            speed       time        distance
Fast Later       50        t             d
Slow Early       40        t+1/2         d

Important to understand, d%3C%3E145


system%2850t=d%2C40%28t%2B1%2F2%29=d%29

50t=40%28t%2B1%2F2%29
5t=4%28t%2B1%2F2%29
5t=4t%2B2
highlight%28t=2%29