An aeroplane that moves at a constant speed of 600 knots flies from town A (14⁰N, 30⁰W) southwards to town B (X⁰S, 30⁰W) taking 3...

An aeroplane that moves at a constant speed of 600 knots flies from town A (14⁰N, 30⁰W) southwards to town B (X⁰S, 30⁰W) taking 3 1/2 hrs. It then changes direction and flies along latitude to town C (X⁰S, 60⁰E). Given π = 3.142 and radius of the earth R= 6370 km
(a) Calculate
(i) The value of X
(ii) The distance between town B and town C along the parallel of latitude in km.
(b) D is an airport situated at (5⁰N, 120⁰W), calculate
(i) The time the aeroplane would take to fly from C to D following a great circle through the South Pole.
(ii) The local time at D when the local time at A is 12.20 pm

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Kavungya answered the question on November 12, 2019 at 13:10

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