SOLUTION: The rectangular solid above has surface area 112 square feet. What is the volume, in cubic feet, of the solid? Here is the link to the image http://152.46.13.240/MoodleContent

Algebra ->  Rectangles -> SOLUTION: The rectangular solid above has surface area 112 square feet. What is the volume, in cubic feet, of the solid? Here is the link to the image http://152.46.13.240/MoodleContent      Log On


   

Question 983224: The rectangular solid above has surface area 112 square feet. What is the volume, in cubic feet, of the solid?
Here is the link to the image
http://152.46.13.240/MoodleContent/SATprep/Math%20Unit%207/Lesson%203%20Assignment/cb3.gif
a. 30
b. 45
c. 60
d. 72
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for the unknown side length x. That is most of the problem.

This sum of surface areas must be 112:
2%2810%2A3%29%2B2%2810%2Ax%29%2B2%283%2Ax%29=112

60%2B20x%2B6x=112
26x=112-60
13x=56-30
13x=26
highlight%28x=2%29

VOLUME, 10%2A3%2Ax=10%2A3%2A2=60%2Acubicfeet