Question

Two docs are 5mm height, The radius of the smaller disc is 1.4cm and the radius of the larger one is 4cm how can I determine it volume?

Answer 1

Given:

Let h be theheight of the two discs

`r_1andr_{2\text{ }}\text{are the rad}ii\text{ of small and larger discs.}`
`\begin{gathered} \text{Volume}=\pi(r_1^2_{}^{})h+\pi(r^2_2)h \\ \text{Volume}=(22)/(7)*(5)/(10)\lbrack1.96+16\rbrack \\ \text{Volume}=(11)/(7)\lbrack17.96\rbrack \\ \text{Volume}=28.22cm^3 \end{gathered}`