# The dimension of cuboid are in ratio3:4:5and its total surface area is 3384cm2.find the dimension of cuboid

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by jansicool003

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by jansicool003

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T.S.A.=2(lb×lh×bh)

2[(3y×4y)×(3y×5y)×(4y×5y)]=3384

2[12y²+15y²+20y²]=3384

2×47y²=3384

94y²=3384

y²=3384/94

y²=36

y=6 cm

3y=3×6=18 cm

4y=4×6=24 cm

5y=5×6=30 cm.

The edges of cuboid will 18 cm, 24 cm and 30 cm...