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s = √25+144
s = √169
s = 13
Lp = 3,14 . 5 (5 + 13)
= 282,6 cm²
=25+144
akar =169
=13
jadi s=13
luas permukaan =phi×r(r+s)
=3,14×5(5+13)
=282,6 cm2