Question

A door of length 2 m and breadth Imis fitted in a wall. The length of the Therefore, the area wall is 4.5 m and the breadth is 3.6 m . Find the cost of white washing the wall, if the rate of white washing the wall is ? 20 per m².​

Answer 1

Area of rectangular door=length×breadth=2m×1m=2m

2

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

2

Now, Area of wall excluding door

=Area of wall including door−Area of door

=16.2−2=14.2m

2

Since, The rate of white washing of 1m

2

the wall=Rs. 20

Therefore, the rate of white washing of 14.2m

2

the wall=20×14.2

=Rs. 284

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

Answer 2

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Question ⤵

A door of length 2 m and breadth Imis fitted in a wall. The length of the Therefore, the area wall is 4.5 m and the breadth is 3.6 m . Find the cost of white washing the wall, if the rate of white washing the wall is ? 20 per m².

Answer ⤵

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

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

= 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 = ` 20

Therefore, the rate of white washing of 14.2 m2 the wall = 20 x 14.2

=Rs 284

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

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