Question

A train 200 m long process a bridge 300 M long. It enters the bridge with a speed of 30 metre per second and it leaves it with a speed of 50 metre per second what is the time taken to cross the bridge

Answer 1

Initial velocity (u) = 30m/s
Final velocity (v) = 50m/s
Displacement (s) = 200+300 = 500m

Next you can see in this figure

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