May 2019 2 140 Report
Apabila luas alas = A dan luas selimut kerucut = S, serta diketahui S - A = 28 cm² dan S + A = 336 cm², maka jari - jari alas kerucut adalah ....

A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 4 : 1

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