Question

A 60m long train moving on a straight level track passes a pole in 5s . Find the speed of the train and the time it will take to cross a 540m long brigde?​

Answer 1

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⏭ Length of the train (D) = 60 m

⏭ Time taken by the train to passes the pole (t) = 5 s

⏭ We need to find the speed of the train

⏭ Also we are asked to find the time it will take to cross a 540m long brigde.

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❂ CALCULATION ❂

$\longrightarrow\:\:\sf Speed = \dfrac{Distance}{Time}$

$\longrightarrow\:\:\sf Speed = \dfrac{Length \: of \: the \: train}{Time}$

$\longrightarrow\:\:\sf Speed = \dfrac{60}{5}$

$\longrightarrow\:\: \underline{ \boxed{\sf Speed = 12 \: {ms}^{ - 1}}}$

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$\longrightarrow\:\:\sf Time = \dfrac{Distance}{Speed}$

$\longrightarrow\:\:\sf Time = \dfrac{540 + 60}{12}$

$\longrightarrow\:\: \underline{ \boxed{\sf Time = 50 \: s }}$

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