Question

Three cubes each of side $5cm$ are joined end to end. Find the surface area of the resulting cuboid.

• A. $350{cm}^2$
• B. $220{cm}^2$
• C. $320{cm}^2$
• D. $250{cm}^2$

Answer 1

Answer: (A)

$350{cm}^2$

Length of the resulting cuboid $5+5+5=15cm$
Height and breadth remain same as $5cm$
Total surface area of a cuboid $=2(l\times b+b\times h+l\times h)$
$=2(15\times 5+5\times 5+15\times 5)=350{cm}^2$