October 2018 1 247 Report
Sebuah lampion berbentuk gabungan kerucut dan belahan bola. Panjang lampion 15,5 cm dan diameternya 7 cm. Bila phi=22/7, maka luas permukaan lampion tersebut adalah
A 253,0 cm2
B 247,5 cm2
C 214,5 cm2
D 209,0 cm2
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