Question

A roll of paper 50cm × 40cm was cut and 20 cubes with edge 4cm were made from it. Find the area of the paper left.​

Answer 1

$area \: of \: rolled \: paper = 50 \times 40 = 2000 {cm}^{2}$

$tsa \: of \: each \: cube \: = {4}^{2} \times 6 = 96 {cm}^{2}$

$paper \: needed \: to \: make \: 20 \: cubes \: = 96 \times 20 = 1920 {cm}^{2}$

$area \: of \: paper \: left = 2000 - 1920 = 80 {cm}^{2}$

Answer 2

Answer:

80cm2

Step-by-step explanation: