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Its circumference is: 15*pi cm Its area is: pi*7.5^2 square cm
circumference = pi*18 cm area = pi*92 square cm
Area = pi*72 square cm Circumference = pi*14 cm
The circumference is 51.125 cm.
The circumference and area of a 21.5 cm diameter circle are:C = 67.54 cmA = 363.1 cm2