11. Find the excess amount required for the land

A farmer wants to fence his circular poultry farm with barbed wire whose radius is 415 \(m\). The cost of fencing is Rs.18 per meter. He has Rs. 10000 with him. How much more amount will be needed to fence his farm? (Use \(π\ \)\(= \)\(22/7\))

 

The excess amount required is Rs. .