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2. 1648.5 ft³

3. 33493.3 cm³

Step-by-step explanation:

Volume of a cylinder is given by the equation;

v=r²h

v=3.14×5×5×21=1648.5 ft³

Volume of a sphere is given by

4/3 r³

v= 4/3 ×3.14×20³ =33493.3 cm³

where r=radius and h=height

Question 1:

For this case we have that by definition, the volume of a cylinder is given by:

Where:

A: It's the radio

h: It's the height

In this case we have to:

Since the diameter is 10ft, then

Substituting:

Thus, the volume of the cylinder is

Question 2:

For this case we have that by definition, the volume of a sphere is given by:

Where:

A: It's the radio

We have to:

Substituting:

Rounding:

n

step-by-step explanation: