# Q. 8.     A door of length and breadth is fitted in a wall. The length of the wall is  and the breadth is (Fig11.6). Find the cost of white washing the wall, if the rate of white washing the wall is

It is given that the length of door is  and breadth is   and the length of the wall is  and the breadth is

Now, we know that

Area of rectangle is

Thus, the area of the wall is

And

Area of the door is

Now, Area to be painted = Area of wall - Area of door = 16.2 - 2 = 14.2

Now, the cost of whitewashing the wall, at the rate of  is

Therefore, the cost of whitewashing the wall, at the rate of  is Rs 284

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