Digits, Grade 8, Volume 1, Homework Helper

### 5-6: TEKS Practice

• 1. Find the volume of the figure. Use 3.14 for π. Round to the nearest whole number as needed.

• 2. A student was asked to find the volume of the solid where the inner cylinder is hollow. She incorrectly said the volume is 2,034.72 in.3.

• a. Find the volume of the solid. Use 3.14 for π. Round to the nearest whole number as needed.

• b. What mistake might the student have made?

• A. She did not subtract the volume of the smaller cylinder.

• B. She found the surface area instead of the volume.

• C. She found the volume of a sphere instead of a cone.

• D. She found the volume of a rectangular prism instead of a cylinder.

• 3. The figure shows a peg used in a board game. Find the amount of plastic needed to create one of these pegs. Use 3.14 for π. Round to the nearest whole number as needed.

• 4. A satellite consists of a sphere with a radius r = 18 m and six equally spaced cylinders with radii r over 2 and height 20 m extending from the sphere.

• a. Find the volume of the satellite. Use 3.14 for π. Round to the nearest whole number as needed.

• b. Draw a picture of the satellite.

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