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The radius of a ball is (5.2pm0.2) cm. T...

The radius of a ball is `(5.2pm0.2)` cm. The percentage error in the volume of the ball is (approximately).

A

0.11

B

0.04

C

0.07

D

0.09

Text Solution

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The correct Answer is:
To find the percentage error in the volume of the ball given the radius and its uncertainty, we can follow these steps: ### Step 1: Understand the formula for the volume of a sphere The volume \( V \) of a sphere is given by the formula: \[ V = \frac{4}{3} \pi r^3 \] where \( r \) is the radius of the sphere. ### Step 2: Identify the radius and its uncertainty The radius of the ball is given as \( r = 5.2 \) cm with an uncertainty of \( \Delta r = 0.2 \) cm. ### Step 3: Determine the formula for percentage error in volume The percentage error in volume can be calculated using the formula: \[ \text{Percentage Error in } V = \frac{\Delta V}{V} \times 100 \] where \( \Delta V \) is the uncertainty in volume. ### Step 4: Use the relationship between the radius and volume to find the uncertainty in volume For small errors, the percentage error in volume can be approximated using the formula: \[ \frac{\Delta V}{V} = 3 \frac{\Delta r}{r} \] This is because the volume is proportional to the cube of the radius. ### Step 5: Substitute the values into the formula Substituting the values we have: \[ \Delta r = 0.2 \text{ cm}, \quad r = 5.2 \text{ cm} \] We can calculate: \[ \frac{\Delta V}{V} = 3 \frac{0.2}{5.2} \] ### Step 6: Calculate the percentage error Now, we compute: \[ 3 \frac{0.2}{5.2} = \frac{0.6}{5.2} \approx 0.11538 \] To convert this to a percentage, we multiply by 100: \[ \text{Percentage Error in } V \approx 0.11538 \times 100 \approx 11.538\% \] ### Step 7: Round the answer Rounding to two decimal places, the percentage error in volume is approximately: \[ \text{Percentage Error in } V \approx 11.54\% \] ### Final Answer The percentage error in the volume of the ball is approximately \( 11.54\% \). ---

To find the percentage error in the volume of the ball given the radius and its uncertainty, we can follow these steps: ### Step 1: Understand the formula for the volume of a sphere The volume \( V \) of a sphere is given by the formula: \[ V = \frac{4}{3} \pi r^3 \] where \( r \) is the radius of the sphere. ...
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Knowledge Check

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