AB = θ360×2πRcos∝ (distance on small circle)
= 64 - 56 = 8o
∝=86o
⇒ AB = 8360 x 2 x 3.142 x 6370 x cos 86
⇒ AB = 22,338.29974360
∴ AB = 62km (to the nearest km)
