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WAEC Mathematics 1993 Question 28

Question 28

Bearings

A plane flies 90km on a bearing 030° and then flies 150km due east. How far east of the starting point is the plane?

  1. A.120km
  2. B.165km
  3. C.195km
  4. D.(150 + 45√3)km
  5. E.240km
Show the answer and explanation

Answer: C (195km)

Explanation

On bearing 030° the eastward part is 90 sin 30° = 45 km. Add the 150 km due east: 45 + 150 = 195 km.