aidez moi svp ex 25 merci beaucoup

bonjour

g = 8x3.14xr = 25.12r

h = 5.5 a au cube

i = 1/8 ab

j = 10/28 a au cube = 5/14 a au cube

Bonsoir

G = 2 x π x r x 4
G = 8πr

H = 2,5a x 0,4a x 5,5a
H = 5,5a³

I = 1/3 x a x 3/8 x b
I = 3/24ab
I = 1/8ab

J = a x 2/7a x 5/4a
J = 2/7a² x 5/4a
J = 10/28a³
J = 5/14a³