SmokyWolves607
20.10.2019 •
Mathematics
Asphere has a surface area of 36π ft2. find the volume of the sphere.
36π ft3
42π ft3
48π ft3
28π ft3
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Ответ:
The surface area of the sphere is given by the equation
,
where A is the surface area and r is the radius.
We want to find the volume of the sphere, which is given by the equation
,
where V is the volume and r is the radius.
Looking at these equations, we see that they both involve the sphere's radius. If we know what r is, we can calculate the volume.
We know that the sphere's surface area is . Plugging that in for A in the surface area equation, we get
, then divide by
, then divide by 4
, then take the square root of both sides
So the radius of the sphere is 3. Plugging this into the volume equation,
, simplify terms
, multiply by 27
So the volume of the sphere is .
Ответ:
36π ft^3
Step-by-step explanation:
The surface area (S) of a sphere can be defined as:
S = 4×π×r^2 = 36×π
Solve for r to get the radius of the sphere:
r = ( = 3
The voluem (V) of a sphere can be defined as:
V= (4/3)×π×r^3
The volume of the sphere is:
V = (4/3)×π×(3^3) = 36π ft^3
The volume of the sphere can be calculated from the surface area given.
Ответ: