MCQ

A train passes a 110 m long platform in 40 s and a boy standing on the platform in 30 s. The length of the train is

#### Options

100 m

110 m

200 m

330 m

Advertisement Remove all ads

#### Solution

**330 m**

**Explanation:**Let the length of train = x m

∴ Speed of train while crossing a platform = `(110+"x")/40`m/s

and speed of train while crossing a boy = `"x"/30`

∴ `"x"/30=(110+"x")/40`

⇒ 4x = 330 +3x

∴ x = 330 m

Concept: Time, Distance and Speed(Entrance Exam)

Is there an error in this question or solution?

Advertisement Remove all ads

Advertisement Remove all ads