a jet flying at an altitude of 30000 ft passes over a small plane flying at 15000 feet headed in the same direction the jets flying twice as fast as a small plane and 45 minutes later they are 450 miles apart find the speed of each plane

The jet has gained on the small plane at the rate of 10 miles per minute, so is flying 600 miles per hour faster. (There are 60 minutes in an hour.)

Since the jet is flying twice as fast as the smaller plane, the small plane's speed is the same as the difference in speed: 600 mph.

The jet's speed is double that, 1200 mph.

small plane: 600 mph jet: 1200 mph