# Volume

Document Sample

```					     Journal Question:
1.    49
2.    12  8  ?
Volume

   Rectangular Prism:
   Kleenex Box
   Cereal Box
   Formula:
   V=lwh This means length x width x
height
Examples:
   Find the Volume using V=lwh
#1.          22in.

6in.
5in.

V=lwh
V=22x5x6
V= 660in3
More Practice:

#2.           20ft.            #3.     10yd.
3ft.
5ft.

V=lwh                   V=lwh
V=20x5x3                V=10x10x10
V=300ft3                V=1,000yd3
Volume
   Cylinders:
   Soup Can
   Coffee Can
   Formula:
V=

r h
2

   Why πr2h?
   πr2 is the area of a circle for the floor of the
cylinder, then we multiply it times the height
Volume of Cylinders:
   Find the volume of the cylinders using
V=πr2h
#1. r = 4in. h=10in.   #2. r = 2in. h=20in.

V= π(42)(10)      V=π(22)(20)
V= π(16)(10)           V= π(4)(20)
V=π(160) in3           V= π(80) in3
More Practice:
   Find the volume. Use 3.14 for pi.
#3.       r = 6ft. h= 30ft.

V=   πr2h
V=   3.14(62)(30)
V=   3.14 x 36 x 30
V=   3391.2 ft3
Homework:

   Workbook pg. #

```
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