Bonjour j'aurais besoin d'aide pour le devoir maison en mathématique niveau 3°. Ma fille ne comprend et j'avoue que je ne comprend pas non plus merci beaucoup a ceux qui réponde.

Plz ! what is the volume of this pyramid? with numbers of 30cm 14cm 18cm

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

Yo need asap pls ! markin da brainiest too !