Use the conversation ratio 1 kilometer equals about 0.62 miles to solve the following problem. An airplane travels about 900 kilometers per hour. What is the airplane's speed in miles per hour?
A. 899.38
B. 558
C. 1240
D. 1451.6
To convert the airplane's speed from kilometers per hour to miles per hour, we use the conversion ratio: 1 kilometer equals approximately 0.62 miles. Thus, we will multiply the speed in kilometers per hour by the conversion factor to get the speed in miles per hour.
Given that the airplane travels about 900 kilometers per hour, we calculate the speed in miles per hour as follows:
900 kilometers per hour × 0.62 miles per kilometer = 558 miles per hour
So the correct answer is:
B. 558