Posted by Adrian on Wednesday, March 7, 2012 at 4:19pm.
A rectangular prism has a length of 100 cm, a height of 10 cm and a width of 5 cm.
What is the volume of the rectangular prism?
A. 3100 square centimeters
B. 1550 square centimeters
C. 5000 square centimeters
D. 1200 square centimeters
2. A cylinder has a diameter of 5 meters and a height of 10 meters.
What is the volume of the cylinder?
A. 188.4 meters cubed
B. 117.75 meters cubed
C. 176.625 meters cubed
D. 196.25 meters cubed
3. A cylinder has a radius of 10 meters and a height of 100 meters.
What is the volume of the cylinder?
A. 65,904 meters cubed
B. 69,008 meters cubed
C. 37,680 meters cubed
D. 31,400 meters cubed

Math  Ms. Sue, Wednesday, March 7, 2012 at 4:22pm
I'll be glad to check your answers.
These sites will help you.
http://math.about.com/od/formulas/ss/surfaceareavol_4.htm
http://www.mathopenref.com/cylindervolume.html

Math  Adrian, Wednesday, March 7, 2012 at 4:29pm
C
B
D?

Math  Ms. Sue, Wednesday, March 7, 2012 at 4:34pm
1 and 3 are correct.
2 is wrong. Did you use the radius in this problem?

Math  Adrian, Wednesday, March 7, 2012 at 4:39pm
no

Math  Ms. Sue, Wednesday, March 7, 2012 at 4:40pm
What is your answer using the radius?

Math  Adrian, Wednesday, March 7, 2012 at 4:41pm
im not sure how to solve this problem at all

Math  Ms. Sue, Wednesday, March 7, 2012 at 4:48pm
Solve it the same way you solved # 3.
V = pi * r^2 * h
See the website above for more explanation.

Math  Adrian, Wednesday, March 7, 2012 at 4:50pm
divide the left and right side of the equation by ð r^2
V / (ð r ^2) = h ?

Math  Ms. Sue, Wednesday, March 7, 2012 at 4:55pm
You need to find the volume of the cylinder. Use the volume formula above.
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