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There is a 40m long Tunnel. The cross section of the tunnel is a semicircle with a radius 6. Find the cost of painting it at the rate of ₹2/m​​​​​​2

Answer» There is a 40m long Tunnel. The cross section of the tunnel is a semicircle with a radius 6. Find the cost of painting it at the rate of ₹2/m​​​​​​2


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