Luas selimut kerucut jari jari 8 cm dsn tinggi 15 cm

R = 8 cm
t = 15 cm
s = √8² + √15²
= √64 + √225
= √289
= 17 cm

Luas Selimut Kerucut
= phi x r x s
= 3,14 x 8 x 17
= 427.04 cm²