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A spherical balloon is filled with air at the constant rate of 200cm2s.Calculate the rate at which the radius is increasing when the radius is10cm.1

Question

A spherical balloon is filled with air at the constant rate of 200cm2s.Calculate the rate at which the radius is increasing when the radius is10cm.1

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Solution 1

The problem involves the concept of related rates in calculus. Here's how you can solve it:

Step 1: Understand the problem The problem is asking for the rate at which the radius of the balloon is increasing (dr/dt) when the radius is 10 cm. We know that the balloon is being filled at a constant rate of 200 cm^3/s.

Step 2: Use the formula for the volume of a sphere The volume V of a sphere with radius r is given by the formula V = 4/3πr^3.

Step 3: Differentiate both sides with respect to time t We get dV/dt = 4πr^2 * dr/dt.

Step 4: Substitute the given values into the equation We know that dV/dt = 200 cm^3/s and we want to find dr/dt when r = 10 cm. Substituting these values into the equation gives us 200 = 4π(10)^2 * dr/dt.

Step 5: Solve for dr/dt Solving the equation for dr/dt gives us dr/dt = 200 / (4π(10)^2) = 0.159 cm/s.

So, the radius of the balloon is increasing at a rate of

This problem has been solved

Solution 2

The problem involves the concept of related rates in calculus. Here's how you can solve it:

Step 1: Understand the problem The problem is asking for the rate at which the radius of the balloon is increasing (dr/dt) when the radius is 10 cm. We know that the balloon is being filled at a constant rate of 200 cm^3/s.

Step 2: Use the formula for the volume of a sphere The volume V of a sphere with radius r is given by the formula V = 4/3πr^3.

Step 3: Differentiate both sides with respect to time t We get dV/dt = 4πr^2 * dr/dt.

Step 4: Substitute the given values We know that dV/dt = 200 cm^3/s and we want to find dr/dt when r = 10 cm. Substituting these values into the equation gives us 200 = 4π(10)^2 * dr/dt.

Step 5: Solve for dr/dt Solving the equation for dr/dt gives us dr/dt = 200 / (4π(10)^2) = 0.159 cm/s.

So, the radius of the balloon is increasing at a rate of approximately 0.159 cm/s when the radius is 10 cm.

This problem has been solved

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