Q2 of 18 Page 104

Areas of some circles are given below find their diameters.

(1) 176 sq cm


(2) 394.24 sq cm


(3) 12474 sq cm


(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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