Question

Obtenha o volume e a area do tronco de cone
r1= 1 cm
r2= 2 cm
h= 1,5 cm

Answer 1

simples e fácil, apenas joga na formula V = [pi x h x (R^2 + R x r + r^2)] / 3
dados: 
pi = 3,14
R = 2 cm
r = 1 cm
h = 1,5 cm

V = [ 3,14 x 1,5 x (2^2 + 2 x 1 + 1^2) ] / 3

V = 32,97 / 3
 resposta V = 10, 99 cm^3

Answer 2

Ab= 1 pi cm^2

AB= 4 pi cm^2

AL= pi(r+R)g

Al= 7,5 pi

AT= AB+Ab+AL

AT=12,5 pi cm^2

VOLUME:

V=H/3(AB+AB* raiz(AB+Ab)

V= (1,5/3)*5raiz(5)