A train passes a man standing on a platform in 8 seconds and also crosses the platform which is 264 metres long in 20 seconds. The length of the train (in metres) is:

Answer: (b)

Let the length of train be L m.

Acc. to question

$$\frac{264+L}{20} = \frac{L}{8}$$

2112 + 8L = 20L

$$L = \frac{2112}{12}$$ = 176 m