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UI Post-UTME Mathematics 2012 Question 7

Question 7

Latitude and Longitude

Find the distance between A(lat. 56°S, long 80°E) and B(lat. 65°N, long 80°E). Take π = 3.142 and R = 6400km

  1. A.13518km
  2. B.65200km
  3. C.11425km
  4. D.13242km
Show the answer and explanation

Answer: A (13518km)

Explanation

They are on the same meridian, 56° + 65° = 121° apart: 121/360 × 2 × 3.142 × 6400 ≈ 13,518 km.