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Let the edges of cuboid be 3x, ,4x ,1x.
l=3x , b=4x , h=1x
Surface area of cuboid = 2(lb+bh+hl)
76=2(3x*4x + 4x*x +x*3x)
76=2(12x^2 +4x^2 +3x^2)
76=2(19x^2)
76=38x^2
76/38=x^2
√2=x
l=3x =3√2
b=4x=4√2
h=x=√2
Volume =lb
=3√2 ×4√2×=12 ×2×√2 =24 cm^3
Option D
l=3x , b=4x , h=1x
Surface area of cuboid = 2(lb+bh+hl)
76=2(3x*4x + 4x*x +x*3x)
76=2(12x^2 +4x^2 +3x^2)
76=2(19x^2)
76=38x^2
76/38=x^2
√2=x
l=3x =3√2
b=4x=4√2
h=x=√2
Volume =lb
=3√2 ×4√2×=12 ×2×√2 =24 cm^3
Option D
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