Tolong dijawab yha kak,besok dikumpulkan,lengkap sama cara

a. volume= 1/2 ling+ kerucut
= 1/2*4/3*3,14*8*8*8 + 1/3*3,14*8*8*15
= 1071,7+ 1004,7
= 2076,4 cm³
b. luas permukaan= 1/2.4πr²+πr(r+s)
= 1/2*4*3,14*8*8 + 3,14*8(8+17)
= 401,9+ 251,2*25
=401,9+6280
=6681,9cm²
mf klo slh :)