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two cubes each of volume 27cm are joined end to end to form a solid . find the surface area of the resulting cubiod

Posted by Mehul Kedia 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Vishal K 4 years, 7 months ago

Volume of Cube=a³ 27=a³ a=3. When two cubes are joined, length=6cm, breadth= 3cm , height= 3cm Total surface are of resulting cuboid= 2(lb+bh+lh) =2(6×3+3×3+6×3) =2(18+9+18) =2(45) =90cm² (The surface area of the resulting cuboid is 90cm².)

2Thank You

Vicky Tiwari 4 years, 7 months ago

a³=27cm³ a=√27 a =3cm In the cuboid l=3+3= 6cm b=3cm h =3 cm Curved Surface area=2(l+b)×h =2(6+3)×3 =2×9×3 =54 cm²

1Thank You

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