Jawaban:
jari jari bola =jari jari alas kerucut, r =7cm
tinggi kerucut, t =24cm
garis pelukis, s =25cm
luas selimut kerucut = π .s. r
=(27/7).(25).(7)
=550 cm²
luas permukaan ½bola =½x4.π.r²
=2.π.r
. =2.(22/7).(7x7)
=308
luas permukaan =luas selimut kerucut + luas permukaan ½bola
=550+308
=858cm
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Jawaban:
jari jari bola =jari jari alas kerucut, r =7cm
tinggi kerucut, t =24cm
garis pelukis, s =25cm
luas selimut kerucut = π .s. r
=(27/7).(25).(7)
=550 cm²
luas permukaan ½bola =½x4.π.r²
=2.π.r
. =2.(22/7).(7x7)
=308
luas permukaan =luas selimut kerucut + luas permukaan ½bola
=550+308
=858cm