Question

Find the surface area of a cuboid with dimensions $4\times 2.5\times 2$ (in inches)

• A. $46{\text{in.}}^2$
• B. $12{\text{in.}}^2$
• C. $26{\text{in.}}^2$
• D. $14{\text{in.}}^2$

Answer 1

Answer: (A)

$46{\text{in.}}^2$

According to the given dimensions let,

$l=4\text{in.}$

$w=2.5\text{in.}$

$h=2\text{in.}$

By using the formula of total surface area of a cuboid we get,

$\begin{array}{cc}Area& =2(lw+wh+hl)\\ & =2\left(4\times 2.5+2.5\times 2+4\times 2\right)\\ & =2\left(10+5+8\right)\\ & =2\times 23\\ & =46{\text{in.}}^2\end{array}$