11. Cacalculate total cost of constructing the track

A school cricket ground is in the shape of a circle with radius 126 $m$. Four tracks each of 3 $m$ wide has to be constructed inside the cricket ground for  track events. Find out the area of the tracks and the cost of constructing the track at the rate of $₹$70 per sq. m.

 

Area of the $4$tracks is  $m^2$.

The total Cost of constructing the track is $₹$ [Submit answer in the whole amount].