Problems on Trains – Train length from pole time and speed: A train runs at 36 km/h and takes 8 seconds to pass a pole. What is the length of the train?

Introduction / Context:Passing a pole means covering the train’s length at the given speed. Convert speed to m/s to multiply by time and obtain length in metres.

Given Data / Assumptions:

• Speed = 36 km/h = 10 m/s.
• Time = 8 s.
• Pole is a point.

Concept / Approach:L_train = speed (m/s) * time (s).

Step-by-Step Solution:L = 10 * 8 = 80 m.

Verification / Alternative check:Converting back: 80 m at 10 m/s takes 8 s, matching the given time.

Why Other Options Are Wrong:45, 48, 60, 288 m do not equal v * t with v = 10 m/s and t = 8 s.

Common Pitfalls:Leaving speed in km/h and multiplying by seconds directly without conversion.

Final Answer:80 meters