Question

Two cubes, each of edge 12 cm are joined end to end. Find the suface 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 =(12+12) cm =24 cm
Breadth and height remaining the same i.e., 12 cm each
Surface area =2 (lb+bh+lh)
$=2(24\times 12+12\times 12+24\times 12)c{m}^2=1440c{m}^2.$