A cone has base area $81\pi\text{ cm}^2$ and height 20 cm. Find the total volume, using \(\pi=3.14

Question

A cone has base area $81\pi\text{ cm}^2$ and height 20 cm. Find the total volume, using $\pi=3.142$ where needed. Give decimal answers to 2 d.p. $h=20\text{ cm}$ Base area: 81π cm² Central section

Accepted Answer

$V=\dfrac13(81\pi)(20)=540\pi=1696.68\text{ cm}^3$.

Volumes of pyramids, cones and hemispheres

Volumes of pyramids, cones and hemispheres

Solution:

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