Question

✨ A train 280 metres long is running at a speed of 42 kmlhr. How much time will it take to pass a man standing on a platform.

Answer 1

We need to convert 42 km/hr to m/s


42km/hr = 42 × 5/18m/s = 35/3m/s


The question seems confusing but if you see practically then the distance required to cross the man = length of the train.

So we have distance = 280m
Speed = 35/3 m/s

So clearly we know that,
time = distance/speed

=> time = 280/(35/3)

=> time = 280 ÷ 35/3

=> time = 280 × 3/35

=>time = 24 second

Hope it helps dear friend ☺️✌️

Answer 2

$\textbf{Hey dearest }$ !

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$Distance = 280 m \\ \\ Speed = 42 km/h \\ \\ Speed = 700m / 60s \\ \\ Time = \frac{Distance}{Speed} \\ \\ Time = 280 × \frac{60}{700} \\ \\ Time = \frac{16800}{700} \\ \\ Time = 24 \: seconds$

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