Answer: Speed at which remaining 1500 miles is covered is 666.67 mph.
Explanation:
Since we have given that
Total distance covered by a pilot = 3000 miles
Speed at which first 1500 miles is covered = 400 mph
Average speed to covered the whole distance = 500 mph
Let the speed at which remaining 1500 miles is covered be y
As we know the formula for "Average Speed" i.e.
Now, we put the value of speed in this equation,
Hence, Speed at which remaining 1500 miles is covered is 666.67 mph.