If the diameter of a circular park is 105 m, then find the length of the wire required to fence around a circular park. 

Given,

The diameter of the circular park (d)$=105 \mathrm{m}$. 

The circumference of the circular park =$\mathrm{\pi d}$

(We know that $\mathrm{\pi }=\frac{22}{7}$)

$= \frac{22}{7}\times 105 = 330 \mathrm{m}$ . 

Therefore, the circumference of the circular park is 330 m.