Answer:
a. 
b. 
Step-by-step explanation:
Volume of the container denotes its quantity. It is a three-dimensional space.
Let V denotes the volume of the container, h denotes the height of the container and r denotes the radius of the container.
a.
The total capacity of the container in terms of π is
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b.
As the cylindrical container is four-fifths full of powder, so the volume of the powder in terms of π is
volume of the container i.e., 
Is this multiple choice? I know that a is correct.
Answer:
All Real
Step-by-step explanation:
1. option 1
2. option 1
3. option 4
4. option 1
5. option c
explanation is in picture attached.
excuse me.for my bad handwriting