Student Name: _____________________________
Date: ________________
Volume Expressions: Round Robin

Pass your paper to the person seated at your right and determine the expression for the first
problem on the paper you have received. You may work with your group to determine the
expression. Circle the appropriate expression.

Upon completion, pass the papers to the right again and complete the second problem. Again,
you may work together to determine the expression.

Continue this process for the remaining problems.
1. Betty’s Beauty Bar sells bath soap in the
shape of a sphere. The diameter of the
soap is 2.5 inches and the cost per cubic
inch is $0.75. Which expression could be
used to determine the cost of each
sphere to the nearest cent?
3
4  2.5 

3  2 
0.75
3
4
 2.5   0.75 
3
3. Shaved ice is served in cone-shaped
cups that have a diameter of 3 inches
and a height of 4 inches. If the coneshaped cup is filled to the top, which
expression could be used to determine
the approximate volume of the shaved
ice in cubic inches?
1 3

3  2 
2
4
2
1
 3   4 
3
2. Karla has a cylindrical candy jar that is
5 inches tall and has a radius of
1.25 inches. The candy jar is 75% full.
Which expression could be used to
determine the approximate volume of
the candy in cubic inches?
 1.25 2

75  (
) 5  
2


0.75  (1.25)2 5 
4. Myrna has a cylindrical ice cream mold
with a radius of 1.5 inches and a height
of 4.5 inches. If she places 5 cubic
inches of fruit in the mold, which
expression could be used to determine
the approximate volume of ice cream in
cubic inches needed to fill the mold?
 1.5 
2
 4.5  5
 1.5 
2
 4.5  5
Communicating about Mathematics
Select one of the problems above and draw a diagram to match the problem situation. Label
the dimensions.
© 2015 Region 4 Education Service Center