find the area enclosed between two concentric circles of radii 8 cm and 6 CM respectively
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R = 8 cm
r = 6 cm
∴ The enclosed area = π × ( R + r ) × ( R - r)
= 22/7 × ( 8 + 6 ) × ( 8 - 6)
= 22/7 × 14 × 2
= 44 × 2
= 88 cm²
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