Radius of the circular ground is $10.5m$. What is the cost(in Rs) to fill up this ground with soil at the rate of $Rs.150$ per sq m?

Given: Radius of circular ground $\left(r\right)=10.5m$

Cost of filling up soil $=Rs.150$ per $sq.m$.

Therefore, Total cost of filling $=Rs.150\times \pi r^2$

$=Rs.[150\times \frac{22}{7}\times (10.5{)}^2]$

$=Rs.51975$