4. Calculate the cost of constructing the drainage

The radius of a circular cricket ground is 14$m$. A drainage 3$m$ wide has to be constructed around the cricket ground for the purpose of draining the rainwater, then calculate the cost of constructing the drainage at the rate of $₹$192 per $sq. m$.

 

The cost of constructing the drainage is $₹$$56120$$55996$$56086$$56142$