The surface are of cuboid is 1372 sq cm. If its dimensions are in ratio 1:4:2 then find its length
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2(lb+BH+lh)=1372. 24x²=1372. x²=49. x=7. h×7=2×7=14,l=7and b=28
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Let length breath and height be 1x,4x,2x
Now,
S.A. of cuboid =2(lb+bh+hl)
=2(x×4x+4x×2x+2x×x)
2x×8X+8X×4X+4X×2X=1372
16X+32X+8X=1372
56X=1372
X=1372÷56
X=24.5
Length =x=24.5cm
Now,
S.A. of cuboid =2(lb+bh+hl)
=2(x×4x+4x×2x+2x×x)
2x×8X+8X×4X+4X×2X=1372
16X+32X+8X=1372
56X=1372
X=1372÷56
X=24.5
Length =x=24.5cm
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