Question

anwer❌ correct plz....​

Answer 1

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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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• First, We have to calculate the area of the door.

Length of the door = 2m

Breadth of the door = 1.5m

Area of the door = A = l × b

Area of the door = 2 × 1.5m²

Area of the door = 3m²

• Now, We have to calculate the area of the wall.

Length of wall = 4.5m

Breadth of the wall = 3.6m

Area of the wall = A = l × b

Area of the wall = 4.5 × 3.6m²

Area of the wall = 16.20m²

• Now, We have to calculate the area of wall excluding the area of the door.

Area of the wall excluding door = Area of wall - Area of door.

= 16.20m² - 3m²

= 13.20m²

• Now, We have to find the cost of white washing the wall.
• For that we have to multiply the Area of the excluding door by cost of white washing per m².

= 13.20 × 20

= ₹264

$\fbox\green{Cost\:of\:white\:wasthing\:the\:wall\:is\:₹264}$