Question

How to find the total surface area of a cuboid ?
Explain with example.

Answer 1

tsa of cuboid = 2(length + breadth)height


eg : find the TSA of a cuboid having dimensions 6*2*5

ans: length=6
breadth=2
height=5
tsa =2(6+2)5
=64 sq units

Answer 2

$tsa \: of \: cuboid \: = 2(lb + bh + hl) \\ \\ where \\ \\ l = length \\ b = breadth \\ h = height$

$\rule{200}{4}$

$\huge\blue{</strong><strong>Example</strong><strong>:</strong><strong>}$ -------

$\color {red}\huge\bold\star\underline\mathcal{Question:-}$ Find the total surface area of a cuboid with dimensions 8 cm by 6 cm by 5 cm. ?

$\huge\underline\purple{\mathcal Answer:-}$ using above formula we get,

$tsa = 2(8 \times 6 + 6 \times 5 + 5 \times 8) \\ \\ tsa = 2(48 + 30 + 40) \\ \\ tsa = 2 \times 118$

$\large\red{\boxed{\sf </strong><strong>TSA\</strong><strong>:</strong><strong>=</strong><strong>\</strong><strong>:</strong><strong>2</strong><strong>3</strong><strong>6</strong><strong>m</strong><strong>{</strong><strong>^</strong><strong>2</strong><strong>}</strong><strong>}}$