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.
6400πkm -
B.
6400km/π -
C.
3200πkm -
D.
3200km -
E.
3200km/π
Correct Answer: Option C
Explanation
P(67°W, 0°N)
Q(67°W 90°N), R = 6400km
Distance PQ =
90/360 x 2 x 6400 π
= 3200πkm