Convert a speed of 22.5 m/s to km/h.

Introduction / Context:
Converting metres per second to kilometres per hour uses the constant factor 3.6 because 1 m/s = 3.6 km/h.

Given Data / Assumptions:

• Speed = 22.5 m/s.

Concept / Approach:
Multiply by 3.6 to obtain km/h.

Step-by-Step Solution:

Verification / Alternative check:
Breakdown: 22.5 * (36/10) = (22.5*36)/10 = 810/10 = 81.

Why Other Options Are Wrong:
They misuse the conversion factor or include random distractors.

Common Pitfalls:
Using 3.0 or 3.2 instead of the correct 3.6 factor.

Final Answer:
81 km/h