Unit Conversion – Convert km/h to m/s: A train moves at 180 km/h. What is its speed in m/s?

Introduction / Context:
Converting km/h to m/s is required to combine speeds with lengths (metres) and times (seconds). The factor is 1000/3600 = 1/3.6, so divide by 3.6 to convert km/h to m/s.

Given Data / Assumptions:

• Given speed = 180 km/h.

Concept / Approach:
m/s = (km/h) / 3.6 = 180 / 3.6.

Step-by-Step Solution:
180 / 3.6 = 50 m/s.

Verification / Alternative check:
Convert back: 50 m/s * 3.6 = 180 km/h, consistent.

Why Other Options Are Wrong:
30, 40, 60, 5 are not equal to 180/3.6.

Common Pitfalls:
Multiplying by 3.6 instead of dividing, which would go in the wrong direction.

Final Answer:
50