di ketahui kerucut diameter 16cm , panjang garis pelukis 15 berapa a luas permukaan b volume

d = 16 cm
r = 16/2 = 8 cm
s = 15 cm (???) corect... 17 cm

a. lp = πr(r+s)
lp = 3,14 x 8 x (8+17) = 628 cm²

b. t = √17²-8² = √(25x9) = 15 cm
volume = 3,14 x 8² x 15/3
= 3,14 x 320
= 1.004,8 cm³