Complete Question
The complete question is shown on the first uploaded image
Answer:
The correct option is C
Step-by-step explanation:
From the question we are told that
The radius of the cylinder is 
The height of the right cone is 
From the diagram we see that container B is a semi -sphere and the volume of a semi-sphere is mathematically represented as

The question tells us that both container has the same radius so

This equivalent to

Solving the equation will produce the same formula as

Get rid of x first -5x then divide the rest
Since width is the smaller value, set width=x. That wold mean that length=x+3. Since Area=width*length, 40=x(3+x). Distribute the x to give you 40=3x+x^2. Set the equation equal to 0 giving you x^2+3x-40=0. Factor the equation to give you (x+8)(x-5)=0. Set each factor equal to 0. x+8=0 gives you x=-8 & x=-5 gives you x=5. Since we're working with lengths of objects, it can't be negative. Therefore, your width is 5. To find length, substitute width into the original expression (x+3). Therefore, length is 5+3=8.
That equals 2 sweetheart. Your not dumb at all everyone has the potential