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The radius of the top of a bucket is 18cm and that of the bottom is 6cm. Its height is 24 cm. Find the capacity of the bucket.

a. 4,752 cm³
b. 6,048 cm³
c. 7,344 cm³
d. 9,216 cm³

1 Answer

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Final answer:

The capacity of a frustum-shaped bucket is calculated using a special formula, and with the given dimensions, the volume is found to be 11765.76 cm³, which does not match any of the options provided in the question.

Step-by-step explanation:

To find the capacity of a bucket with different top and bottom radii, we need to use the volume formula for a frustum of a cone, not a cylinder because the radii are different. The formula for the volume of a frustum is given by:
V = (1/3) * π * h * (R2 + R * r + r2)

where:

  • V = volume of the frustum
  • h = height of the frustum
  • R = radius of the larger circular base (top of the bucket)
  • r = radius of the smaller circular base (bottom of the bucket)

Plugging in the given values:
V = (1/3) * 3.14 * 24 cm * (18 cm2 + 18 cm * 6 cm + 6 cm2)
We will calculate it step by step:

  1. Calculate the squared values and multiplication: 182 = 324 cm2, 62 = 36 cm2, 18 * 6 = 108 cm.
  2. Add these values: 324 + 108 + 36 = 468 cm2.
  3. Multiply by pi: 468 * 3.14 = 1470.72 cm2.
  4. Multiply by height (h): 1470.72 * 24 = 35297.28 cm3.
  5. Finally, divide by 3 to get the volume: 35297.28 / 3 = 11765.76 cm³.

Therefore, the capacity of the bucket is 11765.76 cm3, which is not listed in the given options. There might be an error in the question or the options provided.

User MateuszWawrzynski
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