Question

A cereal box is 28.5cm by 24cm by 7cm. What area of cardboard makes up the containers surface

Answer 1

= 2(Area of top) + 2 (area of side) + 2(area of front) 
= 2(28.5 x 24) + 2 (28.5 x 7) + 2 (24 x 7) 
= 1368 + 399 + 336 
= 2103cm^2