[the surface area]=2*[area of the base]+[perimeter of the base]*height [the surface area]=2*[8*2.5]+[2*(8+2.5)]*12 [the surface area]=40+252-----> 292 in²
the answer is <span>the least amount of cardboard needed to make the cereal box is 292 in</span>²
Rectangle: P = 2 (L+W) but length is 2 meters longer than wide then L = W + 2, So P = 2 (L + W) 24 = 2(W+2+W) 24 = 2 (2 + 2W) 24 = 4 + 4W So 4W = 24 -4 =20 W = 20/4= 5, L = 5+2= 7
