Answer :
(1) We know that area of circle = πr2
Here area of circle = 176cm
(2) Here area of circle = 394.24 sq cm
r = 11.2 cm
D = 2r = 2(11.20) = 22.4 cm
(3) Here area of circle = 12474 sq cm
D = 2r = 2(63) = 126cm
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