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3 Unit A2 1: Pure Mathematics (A-level only)

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Question 233

Two concentric arcs form the curved edges of an annular sector. The outer radius is 3 cm greater than the inner radius. The outer arc is 4 cm longer than the inner arc, and the sum of the two arc lengths is 28 cm.

a.

Find the angle of the sector in radians and the two radii.

[5]
b.

Find the area of the annular sector.

[2]
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3 Unit A2 1: Pure Mathematics (A-level only) Questions

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