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 Form 4 Mathematics Paper 1 Exam Revision Questions With Answers Set 3

The diagram below shows a sector of a circle of radius 15 cm subtending an angle of 240° at the centre of the circle. The sector represents the net of the curved surface of a solid cone.
Capture.PNG
a) Calculate
i. in terms of n the area of the sector.
ii. the base radius of the cone.
b) Determine the total surface area of the cone.


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