Two concentric circle with centre O have radii 21 cm and 42cm .If angle AOB = 60* degree find the area of shaded region ..plz write neatly
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CIRCLE WITH RADII 21
AREA SECTOR
ANGLE/360*πR²
60/360*22/7*21*21 = 231
CIRCLE WITH RADII 42
AREA OF SECTOR
60/360*22/7*42*42=924
THEN
924-231= 693
AREA SECTOR
ANGLE/360*πR²
60/360*22/7*21*21 = 231
CIRCLE WITH RADII 42
AREA OF SECTOR
60/360*22/7*42*42=924
THEN
924-231= 693
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