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tk(tinggi kerucut)=24mm
setengah bola
jari-jari bola=34mm-24mm=10mm
LP bola=2
=2 x 3,14 x
=628
s=
s= akar t kuadrat+ r kuadrat
Lp kerucut=.r.s
=3,14 x 10 x 26
=816,4
Lp Total=628+816,4=1444,4(c)