Answer: Distance between the small plane and the jet is 67.52 miles.
Explanation:
Since we have given that
Distance traveled by the small plane to the north of the airport = 20 miles
Distance traveled by the jet to the west of the airport = 64.5 miles
We need to find the distance between the small plane and the jet.
Since it forms "Right angled triangle " as shown in the figure.

Hence, Distance between the small plane and the jet is 67.52 miles.