Mensurationmedium · Past Paper
Calculate the area of the ring between two concentric circles of radii 10 cm and 7 cm.
A154 sq. cm
B160.28 sq. cm
C51*pi sq. cm
D9*pi sq. cm
✓ Correct Answer: C — 51*pi sq. cm
Area = pi * (R^2 - r^2) = pi * (100 - 49) = 51*pi sq. cm.
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