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NECO Mathematics 2007 Objective — Question 42

Question 42 of 60 from the National Examinations Council (NECO) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

Find the radius of the parallel of latitude 40 degrees N to the nearest km. (R=6,400km)

A. 4,113km
B. 4,902kmCorrect
C. 5,370km

Explanation

r = R cos(40) = 6400 x 0.766 = 4,902.68km.

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