Answer
The surface area of cuboids is\[126\text{ }{{\text{m}}^{2}}\].
Work Step by Step
Compute the surface area of cuboid as mentioned below:
\[\begin{align}
& \text{Surface area of cuboid}=2\left( lb+bh+hl \right) \\
& =2\left( 5\times 3+3\times 6+6\times 5 \right) \\
& =126{{\text{m}}^{2}}
\end{align}\]
