Question

Sides of certain cubes are given below. Find the surface area of each.

(1) 3 cm
(2) 5 cm
(3) 7.2 m
(4) 6.8 m
(5) 9.3 cm
(6) 5.8 cm
(7) 8.6 cm

Answer 1

(1) Side of the cube = 3 cm
Total surface area of the cube = 6 × (side)²
= 6 × (3)² cm²
= 54 cm²

(2) Side of the cube = 5 cm
Total surface area of the cube = 6 × (side)²
= 6 × (5)² cm²
= 150 cm²

(3) Side of the cube = 7.2 m
Total surface area of the cube = 6 × (side)²
= 6 × (7.2)² m²
= 311.04 m²

(4) Side of the cube = 6.8 m
Total surface area of the cube = 6 × (side)²
= 6 × (6.8)² m²
= 277.44 m²

(5) Side of the cube = 9.3 cm
Total surface area of the cube = 6 × (side)²
= 6 × (9.3)² cm²
= 518.94 cm²

(6) Side of the cube = 5.8 cm
Total surface area of the cube = 6 × (side)²
= 6 × (5.8)² cm²
= 201.84 cm²

(7) Side of the cube = 8.6 cm
Total surface area of the cube = 6 × (side)²
= 6 × (8.6)² cm²
= 443.76 cm²