To calculate the time taken by the plane to fly between two cities, we can use the formula:
Time = Distance / Speed
Here, distance = 1836 km and speed = 850 km/h.
Plugging these values in the above formula, we get:
Time = 1836 km / 850 km/h
≈ 2.16 hours (rounded to two decimal places)
Therefore, it takes approximately 2.16 hours for the plane to complete its journey between two cities at an average speed of 850 km/h.