Question

Find the surface area of the rectangular prism.
8 yd
1 yd
3 yd

Answer 1

Formula Used:-

`\qquad \hookrightarrow{ \underline{ \overline{ \boxed{ \sf{Surface \: Area = ( \: lb \: + bh \: + hl \: ) }}}}}\\`

SolutioN:-

`\sf \longrightarrow \: 2 \: ( \: lb \: + bh \: + hl \: ) \\`

`\sf \longrightarrow \: 2 \: ( \: (8 * 3) \: + (3 * 1) \: + (1 * 8) \: ) \\`

`\sf \longrightarrow \: 2 \: ( \: 24 \: + 3 \: + 8 \: ) \\`

`\sf \longrightarrow \: 2 \: ( \: 24 \: + 11 \: ) \\`

`\sf \longrightarrow \: 2 \: ( \: 35 \: ) \\`

`\sf \longrightarrow \: 2 \: * 35 \\`

`\sf \longrightarrow \: 70 \:yd^2\\`

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Therefore, Surface Area of Rectangular Prism is 70 yd²

Answer 2

• 70 yd

Explanation:

We know that,

`\large \bf \: surface \: area \: = 2(lb \: + bh + hl)`

So ,

• Length = 8
• Breadth = 3
• Height = 1

So , Putting the given values in formula

We get

`\large \sf = \: 2(8 * 3 + 3 * 1 + 1 * 8)`

`\large \sf = 2(24 + 3 + 8)`

`\large \sf = 2(35)`

`\large \bf = 70 \:sq \:yd`