Question

the surface area of a cuboid is 1372 square centimetre if its
dimensions are in the ratio of 4 ratio 2 ratio 1 then find the find its length

Answer 1

surface area of cuboid=2(lb+bh+hl),now length=4x,breadth=2x,height=1x,now using formula, 2(8x^2+2x^2+4x^2)=1372,14x^2=686,x^2=49,x=
7.so length of cuboid=28cm.