Question

how much cardnboard is needed to make a rectangular box of length 12cm breadth 10cm height 7cm?

Answer 1

We make a cardboard rectangular box with cardboard sheet. So we need to find the area of the cardboard sheet required.

The box will be an empty box with a lid.

So we need to find the total surface area of a cuboid.

TSA = 2 ( lb + bh + hl)

Given length l = 12 cm  ,  breadth b = 10 cm..   height h = 7 cm.

So TSA = 2 (12*10 + 10 * 7 + 7 * 12) cm²
              = 2 * 274
              =  548 cm²