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How much faster?
Two cars travel in the same direction along a straight highway, one at a constant speed of 52 mi/hr and other at 65 miles per hour.
Assuming they start at the same point, how much sooner does the faster car arrive at destination 13 miles away. Answer in units of min. |
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Think about this one for awhile. If you need to, draw a picture while you read the question so that you know what's going on. The faster car is obviously the one going 65 miles/hour, so find how long it takes for that one to go the distance. When you have that time, use it with the speed of the slower car to find the distance it travels in the same amount of time. You'll have a new starting point for the second car to find the time it takes to get from where the second car is at the time the first car reached the destination to where the first car ended up. Pictures really help!
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