Given: Side of cube (l) = 4.5 cm To find: Surface area of all vertical faces and the total surface area of the cube
i. Area of vertical faces of cube = 4l2
= 4 (4.5)2 = 4 x 20.25 = 81 sq.cm.
ii. Total surface area of the cube = 6l2
= 6 (4.5)2 = 6 x 20.25
= 121.5 sq.cm.
∴ The surface area of all vertical faces and the total surface area of the cube are 81 sq.cm, and 121.5 sq.cm, respectively.
