Answer:
Number 11:
The question is given below as
The circumference of a circle is calculated using the formula below
[tex]\begin{gathered} C_{circle}=2\pi r \\ r=\frac{D}{2}=\frac{140cm}{2}=70cm \\ \pi=\frac{22}{7} \end{gathered}[/tex]
By substituting the values, we will have
[tex]\begin{gathered} C_{c\imaginaryI rcle}=2\pi r \\ C_{c\mathrm{i}rcle}=2\times\frac{22}{7}\times70cm \\ C_{c\mathrm{i}rcle}=44\times10cm \\ C_{c\mathrm{i}rcle}=440cm \end{gathered}[/tex]
Hence,
The circumference of the circle is
[tex]\Rightarrow440cm[/tex]
