By melting a solid sphere of radius $9 \mathrm{cm}$, three solid spheres are formed, of which the radius of the first two are $1 \mathrm{cm} \mathrm{and} 6 \mathrm{cm}$. Find the radius of the third sphere in $\mathrm{cm}$.

From a metal made hemisphere of radius $2 \mathrm{cm}$, a maximum spherical part is cut off. Find the price in $₹$ of the remaining part of metal if the price of $1 \mathrm{cc}$ of metal is $₹7$.

(Round off the answer to next whole number)