tolong yaaa kak,......................

V = 1/3 x luas alas x tinggi
9π = 1/3 x πr² x 8
27π/8 = πr²
27/8 =r²
r = √27/8

s = √8² + (√27/8)²
s = √64 + 27/8
s = √512/8 +27/8
s = √539/8

LP = πr² + πrs
LP = 27π/8 + π√27/8 x √539/8
LP = 27π/8 + π/8√14553
LP = 27π/8 + 120,6π/8
LP = 147,6 π/8
LP = 18,45 π

ini aku bener" gak yakin karna beda banget sama pilihannya tapi semoga membantu dan maa kalo salah

V = 1/3 x luas alas (lingkaran) x tinggi
9π = 1/3 x πr² x 8
27/8 π= r²π
27/8 =r²
r = √27/8

s = √8² + (√27/8)²
s = √64 + 27/8
s = √512/8 +27/8
s = √539/8 = (7√22)/4

Luas Permukaan = πr² + πrs
LP = 27/8 π+ (√27/8 π x √539/8)
LP = 27/8 π+ (21√33)/8 π
LP = (27+21√33)/8
LP = 147,6 π/8
LP = 18,454 π dm^2
LP= 57,999 ~ 58 dm^2