no 20. Gimana sich pake cara nya ya

keliling alas = 2Πr
18,84 = 2(3,14) x r
r = 18,84/6,28 = 3cm

t^2 = s^2 - r^2
t^2 = 5^2 - 3^2
t^2 = 25 - 9 = 16
t = √16 = 4 cm

Volume = 1/3 x Π x r^2 x t
Volume = 1/3 x 3,14 x 3^2 x 4 = 37,68 cm^3

Jawabannya A