Question

1. a cross - country runner runs 10 km in 40 minutes. what is his average speed? 400 km/min 30 km/min 0.25 km/min 4 km/min

Explanation:

Step1: Recall the formula for speed

The formula for average speed is \( \text{Speed} = \frac{\text{Distance}}{\text{Time}} \).

Step2: Substitute the given values

The distance \( d = 10 \) km and the time \( t = 40 \) minutes. Substituting these into the formula, we get \( \text{Speed} = \frac{10}{40} \) km/min.

Step3: Simplify the fraction

\( \frac{10}{40} = 0.25 \) km/min.

Answer:

0.25 km/min (corresponding to the orange option with "0.25 km/min")