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3 years ago

How do I do this!!!!!

Mathematics

1 answer:

-BARSIC- [3]3 years ago

4 0

Pyramid Surface Area = (½ * Perimeter of Base * Slant Height) + Base Area

Base perimeter = 4 * 18 = 72 inches
Base Area = 18*18 = 324 square inches

Pyramid Surface Area = (.5 * 72 * 12) + 324
Pyramid Surface Area = 432 + 324
Pyramid Surface Area = 756 square inches

Source:
http://www.1728.org/volpyrmd.htm

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Answer:

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Step-by-step explanation:

The picture of the question in the attached figure

we know that

The scale of the plan is $\frac{2}{6} \frac{in}{ft}$

step 1

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we know that

The length of a terrace in the plan is equal to 5 inches

by proportion

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step 2

Find the width of the terrace

we know that

The width of a terrace in the plan is equal to

by proportion

Find the width of the terrace in the actual

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step 3

Find the area of a terrace

we know that

The area of a terrace is equal to

$A=LW$

we have

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substitute

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