Question

Two cubes, each of edge length 12 cm are joined end to end. Find the surface area of the resulting cuboid.

• A. $1450c{m}^2$
• B. $1440c{m}^2$
• C. $1420c{m}^2$
• D. $1410c{m}^2$

Answer 1

The correct option is B

$1440c{m}^2$

Length of the resulting cuboid,
l = (12 + 12) cm = 24 cm

Breadth(b) and height(h) remain the same, i.e., 12 cm each.

Surface area of the cuboid

$=2(lb+bh+lh)$

$=2(24\times 12+12\times 12+24\times 12)c{m}^2$

$=1440c{m}^2$