the sides of a cuboid are in ratio 6:4:3 surface area of its faces is 432 sq m find its sides
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t.s.a of cuboid =2 (lb+bh+hl)
Let l=6x, b=4x, h=3x
2 (6x×4x+4x×3x+3x×6x)=432
2 (24x^2+12x^2+18x^2)=432
2×54x^2=432
108x^2=432
x^2=432/108
x^2=4
x=2
6x=6×2=12
4x=4×2=8
3x=3×2=6
Let l=6x, b=4x, h=3x
2 (6x×4x+4x×3x+3x×6x)=432
2 (24x^2+12x^2+18x^2)=432
2×54x^2=432
108x^2=432
x^2=432/108
x^2=4
x=2
6x=6×2=12
4x=4×2=8
3x=3×2=6
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