Exercise condition:

7
A college play ground is in the shape of a circle with radius 143 \(m\). Four tracks each of 4 \(m\) wide has to be constructed inside the play 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  m2.
The total Cost of constructing the track is \(₹\) [Submit answer in the whole amount].
 
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