800π9km
800√3π9km
800π km
800√3π km
Correct answer is C
Angular difference (θ)= 25° + 20° = 45°
α = common latitude = 60°
S = \frac{\theta}{360°} \times 2\pi R \cos \alpha
S = \frac{45°}{360°} \times 2 \pi \times 6400 \times \cos 60°
= \frac{6400\pi}{8} = 800\pi km
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