Question

What is the surface area of this design?

Answer 1

It’s 440 in squared

Explanation:

I ain’t got one I guessed it and I got it right

Answer 2

`490in^2` that is option 2nd is correct.

Explanation:

The surface area of cuboid is:

`2(lb+bh+hl)`

Here, both the shapes are cuboid:

Length is 5 in

Height is 8 in

Breadth is 5 in

And in the other figure

Length is 10 in

Breadth is 10 in

Height is 2 in

Substituting the values in the formula we get:

For first figure:

`2(5\cdot 5+5\cdot 8+8\cdot 5`

`\Rightarrow 2(25+40+40)`

`\Rightarrow 2(105)=210`

And for second figure:

`2(10\cdot 10+10\cdot 2+2\cdot 10`

`\Rightarrow 2(100+20+20)`

`\Rightarrow 2(140)=280`

Now adding areas of both the figures we get:

210+280=490

Therefore, Option 2nd is correct.