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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