To convert the airplane's speed from kilometers per hour to miles per hour, you can use the conversion ratio that 1 kilometer equals about 0.62 miles.
Given:
- Speed in kilometers per hour = 900 km/h
To convert to miles per hour, use the formula:
\[ \text{Speed in miles per hour} = \text{Speed in kilometers per hour} \times 0.62 \]
Now plug in the value:
\[ \text{Speed in miles per hour} = 900 , \text{km/h} \times 0.62 \]
Calculating that:
\[ \text{Speed in miles per hour} = 558 , \text{miles per hour} \]
So, the airplane's speed is approximately 558 miles per hour.