Glencoe Math: Course 3, Volume 2
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Glencoe Math: Course 3, Volume 2 View details
4. Surface Area of Cylinders
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Exercise 28 Page 626

Use the formula for the volume of a pyramid.

260in^3

Practice makes perfect
We are told that rectangular pyramid has a base measuring 12 inches by 5 inches and a height of 13 inches. With this in mind, we want to find its volume. To do it, we can use the following formula. V=1/3BhIn this formula, B is the area of the base, and h is the height of the pyramid. Let's first calculate the area of the base. The base of the rectangular pyramid is a rectangle. We are told that its dimensions are 12 inches by 5 inches. The area of the rectangle equals the product of the lengths of the sides. B=ab ⇒ B&=( 12)( 5) &= 60in^2 Now, we can substitute the area of the base and the height of the pyramid into the formula and calculate V.
V=1/3Bh
V=1/3( 60)( 13)
â–Ľ
Simplify right-hand side
V=1/3(780)
V=780/3
V=260
The volume of the pyramid is 260 cubic inches.