Question

A train running at the speed of 80 km/h crosses a 350 m long tunnel in 36 seconds. What is the length of the train (in meters)?

• A. 350
• B. 380
• C. 420
• D. 450

Answer 1

Answer: (D)

450

Answer 2

The speed of the train is 80 km/h, which is converted to meters per second as $80 \times \frac{1000}{3600} = 22.22$ m/s. The total distance covered by the train in 36 seconds is $22.22 \times 36 = 800$ meters. The length of the train is $800 - 350 = 450$ meters.