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= 1/2 x Π x r x r
= 1/2 x 22/7 x 3,5 x 3,5
= 11 x 0,5 x 3,5
= 19,25 m2 (meter persegi).
Volume
= Luas Alas x tinggi
= 19,25 x 15
= 288,75 m3 (meter kubik).
Jawaban : C