Exercise condition:

6
A verandah of width 3 $$m$$ is constructed along the outside of a room of length 7 $$m$$ and width 3 $$m$$. Determine the area of the verandah and the cost of cementing the floor of the verandah at the rate of $$₹$$15 per sq. m.

The area of the verandah is  ${m}^{2}$.
The total cost of cementing the floor of the verandah is $$₹$$.