Question

Find the total surface area of a cuboid whose length, breadth, and height are $1\text{m},3\text{m},$ and $5\text{m}$, respectively.

• A. $30{\text{m}}^2$
• B. $35{\text{m}}^2$
• C. $42{\text{m}}^2$
• D. $46{\text{m}}^2$

Answer 1

The correct option is D $46{\text{m}}^2$

Given dimensions of the cuboid:
Length $\left(l\right)=1\text{m}$, Breadth $\left(b\right)=3\text{m}$, and Height $\left(h\right)=5\text{m}$
TSA $=2(lb+bh+lh)$
$=2\left[\right(1\times 3)+(3\times 5)+(1\times 5\left)\right]$
$=2(3+15+5)$
$=2\times 23$
$=46{\text{m}}^2$