To convert 400 km/h to miles per hour, you can use the following step-by-step instructions:
Step 1: Understand the conversion factor
1 kilometer is equal to 0.621371 miles.
1 hour is equal to 60 minutes.
Step 2: Set up the conversion equation
We can set up the conversion equation as follows:
400 km/h * (0.621371 miles/1 km) = x miles/hour
Step 3: Cancel out the units
By multiplying 400 km/h by the conversion factor (0.621371 miles/1 km), the km unit cancels out, leaving us with miles per hour.
Step 4: Perform the calculation
Multiply 400 km/h by 0.621371 miles/1 km:
400 km/h * 0.621371 miles/1 km = 248.5484 miles/hour
Step 5: Round the answer
Since miles per hour is typically rounded to the nearest whole number, we can round 248.5484 to 249 miles/hour.
Therefore, 400 km/h is approximately equal to 249 miles/hour.