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luas lingkaran = πr²
d = 14 cm
r = 7 cm
luas selimut = πrs
s = √24²+7²
= √576+49
= √625
= 25 cm
Luas permukaan = πr² + πrs
= 22/7 * 7² + 22/7 * 7 * 25
= 22 * 7 + 22 * 25
= 154 + 550
= 704 cm²