Discussion
A train 100 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?
Answer: A
Crossing the bridge covers the train plus the bridge.
\[ v = \frac{100 + 300}{45} = \frac{400}{45} = 8.89 \text{ m/s} \]
\[ 8.89 \times \frac{18}{5} = 32 \text{ kmph} \]
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