| Exam Board | OCR MEI |
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| Module | C1 (Core Mathematics 1) |
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| Year | 2013 |
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| Session | January |
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| Topic | Circles |
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3 A circle has diameter \(d\), circumference \(C\), and area \(A\). Starting with the standard formulae for a circle, show that \(C d = k A\), finding the numerical value of \(k\).