12. Find the cost of painting

The monument is in the form of a hemisphere mounted on the cuboid. The hemisphere is of radius 7 $m$ and, the cuboid is of dimension $31 m \times 28 m \times 33 m$. If the cost of painting the monument is $₹25$ per metre square, find the total cost of painting the monument?

 

Answer:

 

The total cost of painting the monument $=$ $₹$ .

 

[Note: Use $\pi = \frac{22}{7}$.]