Question

Q.1. A door of length 2m and breadth Im is fitted in a wall. The length and
breadth of wall are 5.5m and 4.4 m respectively. If the height of the wall
is 4m, find the cost of white washing the walls at the rate of Rs 45 per m
​

Answer 1

Answer:

Area of rectangular door = length * breadth = 2 m * 1 m = 2 m2

Area of wall including door = length * breadth = 4.5 m * 3.6 m = 16.2 m2

Now, Area of wall excluding door = Area of wall including door – Area of door

= 16.2 – 2 = 14.2 m2

Since the rate of white washing of 1 m2 the wall = Rs 20

Therefore, the rate of white washing of 14.2 m2 the wall = 20 * 14.2 = Rs 284

Thus, the cost of white washing the wall excluding the door is Rs 284.

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