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Using 3.14 as an approximation[tex]\pi[/tex]How many cubic feet of concrete are needed to build the driveway? (Round to the nearest cubic foot)

Using 314 as an approximationtexpitexHow many cubic feet of concrete are needed to build the driveway Round to the nearest cubic foot class=

Respuesta :

1) Considering that that driveway has the shape of a semicircle, and that distance from point X to Y be its diameter, we can write:

Perimeter

[tex]C_{\text{semicircumference}}=\frac{2\cdot\pi\cdot r}{2}=3.14\cdot5\text{ =15.7 }ft[/tex]

We can't forget that the question asks us the volume filled in by that asphalt into that semicircle. So let's calculate the Volume of that

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