Question

if you decide that the box you clicked on is not the correct length, click in the box again and the value will disappear. then, click in the box that you think is correct.
click in the box with the blue arrow pointing to 1 kilometer on this line:
0 1/2 mi 1 mi 1 1/2 mi 2 mi 2 1/2 mi
click in the box with the blue arrow pointing to 1 mile on this line:
0 1/2 km 1 km 1 1/2 km 2 km 2 1/2 km 3 km 3 1/2 km
click in the box with the blue arrow pointing to 250 meters on this line:
0 1/2 km 1 km 1 1/2 km 2 km 2 1/2 km

Explanation:

Step1: Convert km to miles

We use the conversion factor $1 \text{ km} \approx 0.6214 \text{ mi}$.

Step2: Locate 1 km on mile line

Since $1 \text{ km} \approx 0.6214 \text{ mi}$, this falls between $0$ and $\frac{1}{2} \text{ mi}$? No, correction: $\frac{1}{2} \text{ mi}=0.5 \text{ mi}$, $1 \text{ mi}=1 \text{ mi}$. $0.6214$ is between $0.5$ and $1$, so the box above the mark between $\frac{1}{2} \text{ mi}$ and $1 \text{ mi}$ (closer to $\frac{1}{2} \text{ mi}$) corresponds to 1 km.

Step3: Convert miles to km

Use $1 \text{ mi} \approx 1.6093 \text{ km}$.

Step4: Locate 1 mi on km line

$1.6093 \text{ km}$ falls between $1 \text{ km}$ and $1\frac{1}{2} \text{ km}$, so the box above the mark between $1 \text{ km}$ and $1\frac{1}{2} \text{ km}$ (closer to $1\frac{1}{2} \text{ km}$) corresponds to 1 mile.

Step5: Convert meters to km

$250 \text{ m} = 0.25 \text{ km}$.

Step6: Locate 250m on km line

$0.25 \text{ km}$ is between $0$ and $\frac{1}{2} \text{ km}$, so the box above the first mark after 0 (between $0$ and $\frac{1}{2} \text{ km}$) corresponds to 250 meters.

Answer:

1. For 1 kilometer: The box above the tick mark between $\frac{1}{2}$ mi and 1 mi
2. For 1 mile: The box above the tick mark between 1 km and $1\frac{1}{2}$ km
3. For 250 meters: The box above the first tick mark after 0 (between 0 and $\frac{1}{2}$ km)