To determine how long it would take for an airplane traveling at 487 km/h to cover a distance of 1123 km, you can use the formula:
time = distance / speed
In this case, the distance is 1123 km and the speed is 487 km/h. Plugging in these values into the formula, we get:
time = 1123 km / 487 km/h
Dividing 1123 by 487 gives us approximately 2.307 hours. Therefore, it would take approximately 2.307 hours (or 2 hours and 18 minutes) for the airplane to travel 1123 km at a speed of 487 km/h.