Two points P and Q are on longitude 67°W. Their latitudes differ by 90°. Calculate...
MATHEMATICS
WAEC 1997
Two points P and Q are on longitude 67°W. Their latitudes differ by 90°. Calculate their distance apart in terms of π. (Take radius of the earth = 6400km).
- A. 6400 πkm
- B. 6400km/ π
- C. 3200 πkm
- D. 3200km
Correct Answer: C. 3200 πkm
Explanation
P(67°W, 0°N)
Q(67°W 90°N), R = 6400km
Distance PQ =
90/360 x 2 x 6400 π
= 3200πkm
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