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luas selimut krucut
Ls = π x r x s
= 3,14 x 6 x 10
= 188,4 cm²
S²= r²+t²
s²=6²+ 8²
s²= 36+64=100
s= √100=10
B.L.SELIMUT
=ΠRS
=3,14X6X10
=31,4 X 6
= 188,4 CM²