A train running at certain speed crosses a stationary engine of another train in

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✪ Choose the correct option.

A train running at certain speed crosses a stationary engine of another train in 5 seconds. The length of the train is 100 metres. Determine the speed of the train.

A. 23 m/s
B. Data inadequate
C. 20 m/s
D. 22 m/s

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