of a train, 1 / 4 mile long, and goes to a child bicycle in the same direction along a road running?
parallel to the railroad tracks. If the train is moving at a speed of 25 miles per hour and the child is pedaling at a speed of 15 mph. How long does it take to train for the child.
Difference in velocity = 25 km / h – 15 mph = 10 mph Length of train = 1 / 4 miles Time taken by train over the child = 1 / 4 * 1 / 10 = 1 / 40 hours, ie, 1 / 40 * 60 = 1.5 minutes
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