Question

how many seconds will a 500m long train take to cross a man walking with a Speed of 3km/h, in the direction of the moving train if the speed of the train is 63km/h​

Answer 1

The train will take 30 seconds to cross a man.

Step-by-step explanation:

The length of train is 500 m

Speed of man = 3 km/h

Speed of train = 63 km/h

The direction of man is same as direction of train.

Therefore, Speed of train relative to man speed, s = 63 - 3 = 60 km/h

The has to cover 500 m with speed 60 km/h

Distance = 500 m or 0.5 km

Speed = 60 km/h

$Time=\dfrac{Distance}{Speed}$

$\text{Time}=\dfrac{0.5}{60}\ h$

$\text{Time}=\dfrac{0.5}{60}\times 60\ min$     [tex\because 60\ min = 1 \ h[/tex]

$\text{Time}=\dfrac{0.5}{60}\times 60\times 60\ sec$     [tex\because 60\ sec = 1 \ min[/tex]

$\text{Time}=30\ sec$

#BAL

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