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1. Cari s =√ t²+r²
√24²+7²
√576+49
√625
s = 25 cm
2. Luas permukaan krrucut =
Πr(r+s)
22/7 × 7(7+25)
22(32)
= 704 cm²
LPK= \pi .r(r+s)=22/7.7(7+25)=[/tex]=22.32=704 jadi LPK=704 cm2