Answer:
The formula for the volume of a cylinder is pi*r^2*h
r=radius= 1/2 diameter
h= the height
pi=3.14...
just get the height and plug it in
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
Answer:
D) 
Step-by-step explanation:
In the circumference, 20 represents the diameter, and the radius is <em>half</em> the diameter, so take half of it to get 10. Then use it in the area formula:

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