# 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 - Mathematics

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

• 100 m

• 110 m

• 200 m

• 330 m

#### Solution

330 m

Explanation:
Let the length of train = x m
∴ Speed of train while crossing a platform = (110+"x")/40m/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?