Final answer:
The time it would take for the airplane to reach its destination is 5.95 hours. The airplane's speed in miles/hour is 490.82 miles/hr.
Step-by-step explanation:
To calculate the time it would take for an airplane to reach its destination, we can use the formula:
Time = Distance / Speed
Given that the distance is 4,700 km and the speed is 790 km/hr, we can substitute these values into the formula:
Time = 4,700 km / 790 km/hr = 5.95 hours
To find the airplane's speed in miles/hour, we can use the conversion factor:
1 km/hr = 0.621371 miles/hr
Therefore, the airplane's speed in miles/hour is:
790 km/hr * 0.621371 miles/hr = 490.82 miles/hr