Question

The net of a cuboid is shown below.

Work out the surface area of the cuboid.

Answer 1

...the total area A of this solid (that of its six faces) is given by the formula:

A = 2[ (Length * width + Length * height + width * height)

or A = 2Lw + 2Lh + 2lh.

A = 2(5*2) + 2(5*3) + 2(3*2)

A = 2*10 + 2*15 + 2*6

A = 20 + 30 + 12 = 62cm²

Explanation: