4024/11 May/Jun 2023, Question 16: Area of a Sector
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
A sector OMN has centre O, radius ON = 20 cm and area 30π cm². Find the angle x at the centre.
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Solution · 3 marks
- 1x/360 × π × 20² = 30π
- 2x/360 × 400 = 30
- 3x = 30 × 360 ÷ 400
- 4x = 27
Answer27
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