Mathematics, 08.06.2021 16:50 jltijinotgion121

Two airplanes leave an airport. Thirty minutes later, an observer on the ground sees the first plane with an angle of elevation measuring 56° and an altitude of 9,000 m. At the same time, the second plane has an
angle of elevation of 36° (in the opposite direction) and an altitude of 10,000 m. Find the air distance between the two planes, rounded to the nearest kilometre. Draw a picture to help you solve. [4]

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