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akan tetapi s nya belum diketahui
s² = r²+t²
= 49 + 576
= 625
s = 25
luas selimut kerucut = 22/7 . 7.25 = 550 cm²
s=√(t²+r²)
s=√(24²+7²)
s=√625=25
πrs=22/7 x 7cm x 25cm
luas=550cm²