Pre-Algebra Demystified

The volume of a rectangular solid can be found by using the formula V¼lwh,

where l¼the length, w¼the width, and h¼the height.

EXAMPLE

Find the volume of the rectangular solid shown in Fig. 9-17.

SOLUTION

V¼lwh

¼8 in.6 in.5in:

¼240 in:^3

The volume of a cube can be found by using the formula V¼s^3 , where s is the

length of the side.

EXAMPLE

Find the volume of the cube shown in Fig. 9-18.

SOLUTION

V¼s^3

¼ð4in:Þ^3

¼64 in:^3

CHAPTER 9 Informal Geometry 177

Fig. 9-17.

Fig. 9-18.