Question

A train 120 m long passes a man, standing at the station, in 6 seconds. How long would the train have taken to cross past the man if the length of the train was 140 m?

• A. 7 seconds
• B. 4 seconds
• C. 5 seconds
• D. 6 seconds

Answer 1

The correct option is A 7 seconds

Here, the length of the train ($l$) and the time taken ($t$) to cross past the man are directly proportional.
$\therefore \frac{l_1}{t_1}=\frac{l_2}{t_2}$
$\frac{120}{6}=\frac{140}{t_2}$
$t_2=\frac{140\times 6}{120}=7$
Hence, the required time taken would be 7 seconds.