Question

convert 90 kilometers per hour into miles per hour.

Explanation:

Step1: Recall conversion factor

1 kilometer = 0.621371 miles

Step2: Set up conversion

$90\text{ km/h}\times0.621371\frac{\text{miles}}{\text{km}}$

Step3: Calculate result

$90\times0.621371 = 55.92339\text{ miles/h}$

Answer:

$55.92339$ miles per hour