Math Problem Statement
The radius of a sphere is increasing at a constant rate of 6 meters per second. At the instant when the radius of the sphere is 5 meters, what is the rate of change of the volume? The volume of a sphere can be found with the equation V, equals, start fraction, 4, divided by, 3, end fraction, pi, r, cubed, .V= 3 4 πr 3 . Round your answer to three decimal places.
Solution
We are given that the radius of a sphere is increasing at a constant rate of 6 meters per second, i.e.,
We are also given the equation for the volume of the sphere:
We are asked to find the rate of change of the volume when the radius is meters.
Step 1: Differentiate the volume formula with respect to time .
Using the chain rule, we differentiate with respect to :
Applying the chain rule:
Simplifying:
Step 2: Substitute the known values.
We know and . Substitute these values into the equation:
Step 3: Approximate the value.
Using :
Thus, the rate of change of the volume when the radius is 5 meters is approximately:
Additional Questions:
- How does the rate of change of the volume change if the radius increases at a different rate?
- What would be the rate of change of the volume when the radius is 10 meters?
- How would the rate of change of the volume behave if the radius were decreasing instead of increasing?
- How can you use implicit differentiation to solve similar problems involving other geometric shapes?
- How would this formula change if the sphere had a different geometric constant?
Tip: Always carefully apply the chain rule when dealing with rates of change of related quantities in calculus.
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Math Problem Analysis
Mathematical Concepts
Calculus
Related Rates
Geometry
Formulas
V = (4/3)πr^3
dV/dt = 4πr^2 * dr/dt
Theorems
Chain Rule
Suitable Grade Level
Grades 11-12
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