The total surface area of a cube is 864 cm2. What is its volume (in cm3)?

216 1728 729 512

1728

We know that, Total surface area of cube = 6a2 We know that, Total surface area of cube = 864 6a2 = 864 = a2 = \(\frac{864}{6}\) = 144 = a = \(\sqrt {144}\) = 12 Volume of cube = 12 × 12 × 12 = 1728