To convert the speed from kilometers per hour to miles per hour using the conversion ratio of 1 kilometer ≈ 0.62 miles, you can use the following formula:
\[ \text{Speed in miles per hour} = \text{Speed in kilometers per hour} \times 0.62 \]
Given that the airplane travels about 900 kilometers per hour, we can calculate:
\[ \text{Speed in miles per hour} = 900 , \text{km/h} \times 0.62 \]
Calculating that:
\[ = 900 \times 0.62 = 558 , \text{miles per hour} \]
So the airplane’s speed in miles per hour is 558.