Question

The length, breadth and height are in the ratio 4 2 1 and total surface area is 1372 m2. Find the dimensions of the cuboid

Answer 1

Let l,b,h be 4x,2x,x

TSA=2(lb+bh+hl)

1372 = 2(8x2+2x2+4x2)

686 = 14 x 2

49 = x 2  

so x=7

l,b,h = 28,14,7