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<p>The diagram shows the cross section of a cylindrical pipe with radius $5.6$ m. The shaded region shows the thickness of the pipe, which is $2.8$ m.</p>
<ol class="abc-list"><li><div class="list-item-paragraph">Find the area of the shaded region.</div></li><li><div class="list-item-paragraph">The density of the material used to make the pipe is $40$ kg/m${^3}$, find the mass of the $30$ m pipe.  Give your answer correct to $3$ significant figures.</div></li></ol>

The diagram shows the cross section of a cylindrical pipe with radius $5.6$ m. The shaded region shows the thickness of the pipe, which is $2.8$ m.

The density of the material used to make the pipe is $40$ kg/m${^3}$, find the mass of the $30$ m pipe.  Give your answer correct to $3$ significant figures.

Hollow Cylinder (Pipe) – Area and Mass Calculation

Hollow Cylinder (Pipe) – Area and Mass Calculation

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