If the size of each small square on the map is 2 cm×2 cm, the map scale is 1:200,000, and an airplane takes 12 minutes to fly from City B to City A with a map distance of 12 cm, then the average speed of the airplane is ....
Explanation
Given map scale 1:200,000, map distance 12 cm, and travel time 12 minutes.
Calculate the actual distance using the map scale
Actual distanceMap distance=200,0001
x12 cm=200,0001
x=12×200,000=2,400,000 cm
Convert to kilometers
x=2,400,000 cm=24 km
Convert time to hours
t=12 minutes=6012 hours=51 hours
Calculate average speed
v=tx
v=51 hours24 km
v=24×5=120 km/h
Therefore, the average speed of the airplane is 120 km/h.
