A and B are two points on the latitude 40⁰N. The two points lie on the longitude 20⁰W and 100⁰E respectively.

A and B are two points on the latitude 40⁰N. The two points lie on the longitude 20⁰W and 100⁰E respectively.
(a) Calculate:-
(i) The distance from A to B along a parallel of latitude.
(ii) The shortest distance from A to B along a great circle.
(b) Two planes P and Q left A for B at 400 knots and 600 knots respectively. If P flew along the great circle and Q along
parallel latitude, which one arrived earlier and by how long. Give your answer to the nearest minute. (Take R =6370 km and 𝜋 =22/7)

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sharon kalunda answered the question on April 26, 2019 at 13:42

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