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KatRina [158]
3 years ago
9

Surface area of a solid figure

Mathematics
1 answer:
vivado [14]3 years ago
3 0

Answer: OPTION C

Step-by-step explanation:

There is a general formula for calculate the surface area of a regular pyramid. This is:

SA=\frac{1}{2}p*l+B

Where p is the perimeter of the base, l is the slant height and B is the area of the base.

The base is a square, therefore B is:

B=(5.3yd)^{2}=28.09yd^{2}

 The perimeter is:

P=4(5.3yd)=21.2yd

Then, the surface area is:

SA=\frac{1}{2}(21.2yd)(11.1yd)+(28.09yd^{2})=145.75yd^{2}

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