Question

Three cubes of each side 4 cm are joined end to end. Find the surface area of the resulting cuboid.

Answer 1

By joining three cubes of side 4 cm each, end to end, we get a cuboid.

$\text{Length of cuboid}=4\times 3=12cm$

$\text{Breadth}=4cm$

$\text{and height}=4cm$

$\therefore \text{Surface area}=2(lb+bh+hl)$

$=2[12\times 4+4\times 4+4\times 12]c{m}^2$

$=2[48+16+48]c{m}^2$

$=2\times 112=224c{m}^2$