Correct Answer - Option 2 : 150 meter

**Given: **crossing time = 5 seconds

**Formula used :**Time = Distance/ Speed = [Length of faster train + Length of man] / Relative Speed

Also, since two trains are running opposite to each other

Relative Speed (RS) = Speed of faster train + [Speed of man(= Speed of slower train)]

**Calculation:**

Accordingly,

RS = (50 + 58) kmph = 108 kmph

⇒ 108 × 5/18 m/s = 30 m/s

Time = [Length of faster train + Length of man] / Relative Speed

⇒ 5 = [Length of faster train + 0] / 30

⇒ Length of faster train = 5 sec. × 30 m/s = 150 meter

**∴ The length of the faster train is 150 meter.**