Question

A train $150$ m long, takes $30$ seconds to cross a bridge $500$ m long. How much time will the train take to cross a platform $370$ m long?

• A. $36$ sec
• B. $30$ sec
• C. $24$ sec
• D. $18$ sec

Answer 1

Answer: (C)

$24$ sec

Length of the train = 150 m

Length of the train = 500 m

$\therefore$ Total length $=(500+150)m=650m$

$\therefore$ Speed of the train $=\frac{650}{30}m/sec=21\frac{2}{3}m/sec$

Now total length of the train and new bridge $=(370+150)m=520m$

$\therefore$ Time taken $=\frac{520\times 3}{65}sec=24sec.$