Question

understand: the question is asking how fast, so we know we are looking for speed as the answer, and the answer should be in miles per hour.
we need to use a unit conversion between kilometers and miles. 1 kilometer ≈ 0.6213 miles.
solve: since the speed limit is 100 km/h, we calculate the speed in miles per hour by multiplying 0.6213 by 100.

Explanation:

Step1: Identify conversion factor

$1 \text{ kilometer} \approx 0.6213 \text{ miles}$

Step2: Multiply speed by conversion factor

$100 \times 0.6213 = 62.13$

Answer:

62.13 miles per hour