Question

A 50m long train is moving with a speed of 90 km/hr. How much time will it take to cross a platform of 200 m ?​

Answer 1

Answer:

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Answer 2

Length of train = 50 m

Length of platform = 200 m

Speed of train = 90 km/h

⇒ S = 90 × ⁵/₁₈

⇒ S = 5 × 5

⇒ S = 25 m/s

→ Total distance = Length of train + Length of platform

⇒ D = 50  +  200 m

⇒ D = 250 m

We have speed and distance , we need to find time ,

$\bigstar\ \; \sf Speed=\dfrac{Distance}{Time}$

$:\implies \sf S=\dfrac{D}{t}$

$:\implies \sf 25=\dfrac{250}{t}$

$:\implies \sf t=\dfrac{250}{25}$

$:\implies \sf \pink{t=10\ s}\ \; \bigstar$

So , Time taken to cross a platform of 200 m is 10 s