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Uniform and Non-Uniform Velocity

A 250m long...

Question

A $250$ m long train passes a platform in $15$ seconds at a speed of $30$ m/s.Find the length of the platform.

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Solution

Total Distance Traveled by train in 15 seconds will be equal to the length of the Train + Length of Platform

Let the Length of Platform be $l$
Now, $v = 30 = \frac{250 + l}{15} \Rightarrow 450 = 250 + l \Rightarrow l = 200 m$

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