Use the conversion ratio 1 kilometer equals about 0.62 miles to solve the following problem. An airplane travels about 900 kilometers per hour. What is the airplanes's speed in miles per hour?
A. 558
B. 1,240
C. 1,451.6
D. 899.38
To solve this problem, we can multiply the speed in kilometers per hour by the conversion ratio to get the speed in miles per hour.
We can set up the following equation to solve for the speed in miles per hour:
Speed in miles per hour = Speed in kilometers per hour * Conversion ratio
Speed in miles per hour = 900 km/hr * 0.62 miles/km
Speed in miles per hour = 558 miles/hr
So, the airplane's speed in miles per hour is 558 miles/hr.
Therefore, the correct answer is A. 558.