Final answer:
To calculate the distance to your fuel stop, subtract the current mile marker from the fuel stop's mile marker. From Mile Marker 100 to Mile Marker 324, it is 224 miles until the fuel stop. The speed limit of 100 km/h equals approximately 62.14 miles per hour.
Step-by-step explanation:
When you are at Mile Marker 100 on I-81 in Virginia and your fuel stop is at Mile Marker 324, you need to calculate the distance to your fuel stop by subtracting your current mile marker from the mile marker where your fuel stop is located. The formula for this calculation is as simple as: Fuel Stop Mile Marker - Current Mile Marker = Distance Until Fuel Stop.
To find the answer, you subtract 100 from 324: 324 - 100 = 224. Therefore, you will need to travel 224 miles until you stop for fuel.
Regarding the speed limit question, if the speed limit on some interstate highways is about 100 km/h and 1.0 mile is about 1.609 km, then to convert kilometers per hour to miles per hour, you would divide 100 by 1.609. Doing this conversion gives you approximately 62.14 miles per hour as the speed limit in miles per hour.