Question

find the volume and total surface of the cube whose each edge is 2 m 40 cm

Answer 1

$edge \: length \: \: x = 2m \: 40 \: cm = 2.4 \: m \\ volume = {x}^{3} = {2.4}^{3} = 13.825 \: {m}^{3} \\ total \: surface \: area = 6 {x}^{2} \\ = 6 \times {2.4}^{2} = 34.56 \: {m}^{2}$