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General Mathematics Paper 2, Nov/Dec. 2008  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 Main
General Comments
Weakness/Remedies
Strength
Question 12



In the diagram, /PR/ = /RQ/, /RS/ = 10cm <RPS = 70o and <PQR = 30°. Calculate /PS/.

(b) Two points A and B lie on the parallel of latitude 60oN. A lies on longitude 20oE and B is 1500km due east of A. Calculate the:

  • radius of the parallel of latitude on which they lie;
  • longitude on which point B lies correct to the nearest degree. ( Take π = 3.142, radius of the earth = 6400km)
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Observation

The part (a) of the question was well interpreted by most of the candidates who attempted the question. They were able to get <PRS = 60˚ and apply the sine rule correctly.

In part (b), most candidates got the radius of the latitude but could not go further to find the longitude of B by adding 20˚ to the θ calculated.

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