Respuesta :
Answer:
6.1 miles per hour
Step-by-step explanation:
That is 9 feet per second.
There are 3600 seconds in an hour.
9 x 3600 is 32400
That is 32400 feet in an hour.
32400 feet is about 6.1 miles. (rounded)
The airplanes speed is 6.1 miles per hour.
The speed of the airplane will be 6.13 miles/hour. It is obtained by the unit conversion.
What is speed ?
Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. its si unit is m/sec.
Unit conversion;
1 ft/sec=0.681818 miles/hr
The speed in ft /sec;
v=d/t
v=18 feet/2 second
v=9 ft/sec
1 ft/sec=0.681818 miles/hr
9 ft/sec=9×0.681818 miles/hr
9 ft/sec=6.13 miles/hr
Hence, the speed of the airplane will be 6.13 miles/hour.
To learn more about the speed refer to the link;
https://brainly.com/question/7359669
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