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A train moving at a speed 49 MPH is passed by a train moving at 63 MPH a man in first train noticed that the second train too 4.5 seconds to pass him how long is the second train?
Wiki User
∙ 14y ago
4.5 seconds = (4.5/3,600) = 0.00125 hour
In the man's frame of reference, the faster train is moving past him at 14 miles per hour.
1 mile = 5,280 feet
1 hour = 3,600 seconds
14 mph = (14 x 5,280 / 3,600) ft per second
Length = (Speed) x (time) = (14 x 5,280 / 3,600) ft per sec x (4.5) sec = 92.4 ft
Wiki User
∙ 14y ago
To find the length of the second train, we can use the formula speed = distance / time. The second train took 4.5 seconds to pass the man, so we can say that the distance it traveled is equal to its length. Therefore, the length of the second train is (speed of the second train) * (time it took to pass) = 63 MPH * 4.5 seconds = 283.5 feet.
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