Calculate the TSA of a cupboard which measures 12cm by 10cm by 8cm.?

Answer 1

TSA = total surface area???

With these measurements this cupboard would hold only one cup.

Are you sure of these measurements?

Answer 2

well, whatever the size of the intended contents, if the dimensions are x,y,z, the area consists of 3 pairs of rectangles:

2(xy+xz+yz)