Question

A 50 m long train crosses a pole in 10 s. How much time would the same train take to cross a 250 m long platform?

• A. 50 s
• B. 40 s
• C. 60 s
• D. 70 s

Answer 1

The correct option is C 60 s

Given:
Length of train, L = 50 m
Time taken to cross the pole, T = 10 s
Length of platform, D = 250 m

Speed of train = $\frac{L}{T}$ = $\frac{50m}{10s}$ = $5m{s}^{-1}$

Now, distance to be covered by the train = Length of platform + Length of the train.
D = 250 m + 50 m
D = 300 m
t = $\frac{D}{t}$
t = $\frac{300m}{5s}$ = $60s$

Hence, the train will take 60 s to cross the 250 m platform.