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Two trains ru...

Question

Two trains running in the same direction at 40 km/hr and 22 km/hr completely pass one another in 1 minute If the length of the $1^{s t}$ train is 125 m then what will be the length of $2^{n d}$ train in metres

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Solution

Relative speed of trains = 40 - 22 = 18 km/hr $∵$ 18 km/hr = 5 m/sec
Let
the length of second train = L m Time taken to cross each other
= $\frac{L + 125}{5} ∴ \frac{L + 125}{5} = 60 \Rightarrow L = 175$ m

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