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9. What is the volume of the composite figure to the nearest hundredth of a cubic centimeter?4pts6 cm(1282 cm6 cm6 cm

9. What is the volume of the composite figure to the nearest hundredth of a cubic-example-1

1 Answer

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ANSWER

The volume is 197.15 cm³

Step-by-step explanation

We have to find the volume of the cube and then substract the volume of the cylinder inside.

The volume of the cube is the product of its sides:


V_{\text{cube}}=6\operatorname{cm}*6\operatorname{cm}*6\operatorname{cm}=216\operatorname{cm}^3

The volume of a cylinder is the area of its base multiplied by its height. This cylinder's diameter is 2cm, therefore its radius is 1cm. The area of its base is:


A_{\text{base}}=\pi\cdot r^2=\pi\cdot(1\operatorname{cm})^2=\pi\cdot1\operatorname{cm}=3.14\operatorname{cm}^2

The height of the cylinder is the width of the cube: 6cm. The volume of the cylinder is:


V_{\text{cylinder}}=A_{\text{base}}\cdot h=3.14\operatorname{cm}^2*6\operatorname{cm}=18.85\operatorname{cm}^3

Finally, the volume of the composite figure is:


V_{\text{figure}}=V_{\text{cube}}-V_{\text{cylinder}}=216\operatorname{cm}^3-18.85\operatorname{cm}^3=197.15\operatorname{cm}^3

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