Problema Solution
an aircraft is vertically above a point which is 10 km west and 15 km north of a control tower. if the aircraft is 4000 m above the ground.how far is it from the control tower.
Answer provided by our tutors
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s^2 = x^2 + y^2 + z^2 = 100 + 225 + 16
s = sqrt(341)
s =18.47 km from tower control to the aircraft