A cyclist covers a distance of 45 km in 3 hours and 15 minutes. What is his average speed in m/s?

Step-by-step solution

1. Convert time to seconds: $3\text{ h}15\text{ min}=3.25\text{ h}=3.25\times 3600\text{ s}=11700\text{ s}$.
2. Convert distance to metres: $45\text{ km}=45000\text{ m}$.
3. Compute speed: $v=\frac{45000\text{ m}}{11700\text{ s}}\approx 3.846\text{ m/s}$.
4. Round to two decimal places: $3.85\text{ m/s}$.

Concept tested: Unit conversion and average speed

Published 1 October 2026 · How this solution was prepared and checked