The side of a cuboid are in the ratio 6:4:3.Surface area of its faces is 432 sq.m.Find its sides?
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2(lb+bh+hl)=432
lb+bh+hl=216
let the original l, b,h be 6x,4x and 3x
so 6x×4x+4x×3x+3x×6x=216
24x^2+12x^2+18x^2=216
54x^2=216
x^2=4
x=2
hence length=6x=12
breadth=4x=8
height=3x=6
lb+bh+hl=216
let the original l, b,h be 6x,4x and 3x
so 6x×4x+4x×3x+3x×6x=216
24x^2+12x^2+18x^2=216
54x^2=216
x^2=4
x=2
hence length=6x=12
breadth=4x=8
height=3x=6
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