Exercise 7 Page 657

We want to find the volume of a rectangular glass pyramid. The base's length is 3 inches long and 2.5 inches wide. The pyramid's height is 4 inches. We can calculate the volume of a pyramid using the following formula. V=1/3Bh Here, B is the area of the base, and h is the height. The base of our pyramid is a 3 inches by 2.5 inches rectangle. Its area B is a product of these sides, so it equals 3 ( 2.5) = 7.5 square inches. The height h is 4 inches. Let's substitute these values into the formula and calculate V.

V=1/3Bh

SubstituteII

B= 7.5, h= 4

V=1/3( 7.5)( 4)

▼

Simplify right-hand side

MoveRightFacToNumOne

1/b* a = a/b

V=7.5/3(4)

CalcQuot

Calculate quotient

V = 2.5(4)

Multiply

Multiply

V=10

The volume of the glass pyramid is 10 cubic inches.