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5. Four cubes of side 7 cm are joined together to form a cuboid. Find the surface area of the resulting cuboid.​

Answer»

Length of cuboid (l) = 7 × 4 = 28 cmbreadth of cuboid (b) = 7 cmheight of cuboid (h) = 7 cmSurface AREA of cuboid = 2(lb + BH + hl)= 2(28 × 7 + 7 × 7 + 7 × 28)= 2(196 + 49 + 196)= 2 × 441= 882 cm SQUARE.



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