Posted by **Anonymous** on Tuesday, October 1, 2013 at 11:21am.

Two commercial airplanes are flying at an altitude of 40,000 ft along straight-line courses that intersect at right angles. Plane A is approaching the intersection point at a speed of 427 knots (nautical miles per hour; a nautical mile is 2000 yd or 6000 ft.) Plane B is approaching the intersection at 439 knots.

At what rate is the distance between the planes decreasing when Plane A is 5 nautical miles from the intersection point and Plane B is 5 nautical miles from the intersection point?

- Calc -
**bobpursley**, Tuesday, October 1, 2013 at 11:35am
see other post

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