7. Determine the cost of tin-plating the hemispherical bowl

Renu bought a hemispherical bowl of inner diameter 40 \(cm\). Determine the cost of tin-plating inside the bowl at the rate of \(₹\)12 per \(10 \ cm^2\). \([\)Use \(\pi = 3.143]\)

 

 

[Note: Round off the cost to the whole number]