SOLUTION: two cars start at a given point aand travel in the same direction at average speeds of 40 miles per hour and 55 miles per hour. how much rime must elapse before the two cars are 5

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Question 70194: two cars start at a given point aand travel in the same direction at average speeds of 40 miles per hour and 55 miles per hour. how much rime must elapse before the two cars are 5 miles apart?
Answer by stanbon(48568) About Me  (Show Source):
You can put this solution on YOUR website!
two cars start at a given point aand travel in the same direction at average speeds of 40 miles per hour and 55 miles per hour. how much rime must elapse before the two cars are 5 miles apart?
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1st Car DATA
rate=40 mi/hr ; time = x hrs ; distance = rt = 40x miles
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2nd Car DATA:
rate=55 mi/hr ; time = x hrs ; distance = rt = 55xmiles
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EQUATION:
faster car distance - slower car distance = 5 miles
55x - 40x = 5
15x=5
x=1/3 hr or 20 minutes
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Cheers,
Stan H.