Find the distance between two towns P(45°N, 30°W) and Q(15°S, 30°W) if the radius of the earth is 7000km. [\(\pi = \frac{22}{7}\)]
- \(\frac{1100}{3}\)km
- \(\frac{2200}{3}\)km
-
\(\frac{22000}{3}\)km
- \(\frac{1100}{3}\)km
The correct answer is: C
Explanation
Angular difference = 45° + 15° = 60°.
\(D = \frac{60°}{360°} \times 2 \times \frac{22}{7} \times 7000\)
= \(\frac{22000}{3} km\)