How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?

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Solution

The correct option is B 30
Speed of the train relative to man $= (63 - 3) k m / h r$
$= 60 k m / h r$
$= (60 \times \frac{5}{18}) m / s e c$
$= (\frac{50}{3}) m / s e c .$
$∴$ Time taken to pass the man $= (500 \times \frac{3}{50}) s e c$
$= 30 s e c .$

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How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?

The correct option is B 30Speed of the train relative to man =(63−3)km/hr=60km/hr=(60×518)m/sec=(503)m/sec.∴ Time taken to pass the man =(500×350)sec=30sec.

The correct option is B 30
Speed of the train relative to man $= (63 - 3) k m / h r$
$= 60 k m / h r$
$= (60 \times \frac{5}{18}) m / s e c$
$= (\frac{50}{3}) m / s e c .$
$∴$ Time taken to pass the man $= (500 \times \frac{3}{50}) s e c$
$= 30 s e c .$