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Two trains running on parallel tracks are 600 miles apart. One train is moving e
Two trains running on parallel tracks are 600 miles apart. One train is moving e
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2024-01-12
48
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问题
Two trains running on parallel tracks are 600 miles apart. One train is moving east at a speed of 90 mph, while the other is moving west at 75 mph. How long will it take for the two trains to pass each other?
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答案
This is a standard Rate×Time=Distance problem. Since the two trains start 600 miles apart, the combined distance traveled by both trains must equal 600. Using the R×T=D formula, you know that (Rate of Train 1×Time of Train 1)+(Rate of Train 2×Time of Train 2)=600. You are given that the rate of travel is 90 mph for the first train and 75 mph for the second train, and the distance traveled is 600 miles; therefore, you must solve for T, as follows:
90T+75T=600
165T=600
T=(approximately) 3.64 hours
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