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3 years ago

S=_ft ?? Please also tell me how to do it

Mathematics

1 answer:

irina1246 [14]3 years ago

7 0

Answer:

$70ft^2$

Step-by-step explanation:

Surface area is the sum of all sides of the area. Since it is a rectangular prism, each surface area will be multiplied by two to account for the opposite side (ex. top and bottom are the same area).

The front/back area is $1*11$ or 11. So the sum of the areas is 22.

The right/left area is $2*1$ or 2. So the sum of the areas is 4.

The top/bottom area is $2*11$ or 22. So the sum of the areas if 44.

We add these together to find the surface area.

$22+4+44=70$

The surface area is $70ft^2$

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