Question

A 900 meter long train crosses a platform with the speed of 90 km/hr. It takes 1 minutes to cross the platform. Find the length of platform.

1. 800 meter
2. 1000 meter
3. 600 meter
4. 900 meter

Answer 1

Correct Answer - Option 3 : 600 meter

Given:

The length of train = 900 m

Speed of train = 90 km/hr.

Time = 1 minutes

Formula used:

Speed =  Distance/Time

Calculations:

Let, the length of platform is x.

90km/hr = (900 + x)/1 minutes

⇒ 90 × 5/18 = (900 + x)/60

⇒ 25 × 60 = 900 + x

⇒ 1500 - 900 = x

⇒ x = 600 m

∴ The length of platform is 600 meter.