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Unitary Method

A train, 130 ...

Question

A train, 130 m long crosses a platform in 30 s with a speed of 45 km/h, length of platform is

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Solution

Length of platform = $l_{1}$
Length of train = $l_{2}$
$l_{1} + l_{2} = 45 \times \frac{5}{18} \times 30 = 375$
Therefore,
$l_{1} = 375 - 130 = 245 m$

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