Answer : 6cm is the length of the side of a cube Given : Total surface area is 216 cm² To find : The length of the side of a cube Solution : Given, Surface area is 216 cm² As we know that, Surface area of cube = 6 × a² ⟾ Surface area of cube = 6 × a² ⟾ 6 × a² = 216 ⟾ a² = 216/6 ⟾ a² = 36 ⟾ a = √36 ⟾ a = 6cm Hence , 6cm is the length of the side of a cube More Explanation : Cube has 6 faces Cube has 12 edges Cube has 8 vertices Lateral surface area of cube = 4a² Total surface area of cube = 6a² Volume of cube = a³ Cube is a solid and 3D shape Reply

Answer:6cm

Step-by-step explanation:Answer:Given:Tofind:Solution:Given,

Asweknowthat,Surfaceareaofcube=6×a²⟾⟾ 6 × a² = 216

⟾ a² = 216/6

⟾ a² = 36

⟾ a = √36

⟾ a = 6cm

Hence,6cmisthelengthofthesideofacubeMoreExplanation: