Answer:
86,400 km.
Explanation:
Let x be time (hours) and y be distance (km).
If an aeroplane covers a distance of 7200 km/h then we can write an equation as y = 7200x
This means if x = 1 i.e time is one hour and the distance is 7200 km.
Therefore, in 12 hours will be x = 12, substitute x = 12 in y = 7200x.
Thus, y = 7200(12) then calculate as we receive 86,400 km.
Hence, it will cover 86,400 km in 12 hours.
Second Method
Another method involves with speed formula, speed = distance/time.
Because we want to find distance, move time to multiply with speed.
Thus, our new formula for distance is distance = speed*time.
Our speed is 7,200 km/h and time would be 12 because we want to find distance within 12 hours.
Hence, distance = 7200*12 = 84,600 km.
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