4. Calculate the cost of constructing the drainage

The radius of a circular playground is 28\(m\). A drainage 2\(m\) wide has to be constructed around the playground for the purpose of draining the rainwater, then calculate the cost of constructing the drainage at the rate of \(₹\)141 per \(sq. m\).

 

The cost of constructing the drainage is \(₹\)\(51404\)\(51280\)\(51426\)\(51370\)