Question

Find the curved surface area and total surface area of a cube of edge 20cm.(2marks)​

Answer 1

Answer:

Curved surface area is 1600

total surface area is 2400

Step-by-step explanation:

$curved \: surface \: area = 4( {a})^{2}$

$curved \: surface \: area = 4( {20})^{2}$

$curved \: surface \: area = 4(400) \\ curved \: surface \: area = 1600$

$total \: surface \: area = 6( {a})^{2} \\ total \: surface \: area = 6( {20})^{2} \\ total \: surface \: area = 6(400) \\ total \: surface \: area = 2400$