Question

A runner can complete a 750 m race in two and a half minutes. The speed of the runner is

• A. 18 km/hr
• B. 16 km/hr
• C. 20 km/hr
• D. 22 km/hr

Hint:

Always convert distance to km and time to hours for km/hr speed problems.

Answer 1

The Correct Option is A

Concept: Speed = Distance / Time (convert units properly). Explanation: Distance = 750 m = 0.75 km Time = 2.5 minutes = $\frac{2.5}{60}$ hours \[ Speed = \frac{0.75}{2.5/60} = \frac{0.75 \times 60}{2.5} \] \[ = \frac{45}{2.5} = 18 \text{ km/hr} \]