Question

A wall of a room is of dimension 5 m x 4 m. It has a window of dimensions 2 m x 1 m and a door of dimensions 3 m x 1m. Find the cost of painting the wall at ₹ 10 per sq.m.

Answer 1

Answer:=16.25$m^{2}$

 

Step-by-step explanation:

Given, Length of the room =5m  

Breadth of the room =4m  

Area of the room =5×4=20m  

2

 

Also,  

Length of the window =1.5m and  

Breadth of the window =1m  

Area of the window =1.5×1=1.5m  

2

 

Now,  

Length of the door =2.25m  

Breadth of the door =1m  

Area of the door =2.25×1=2.25m  

2

 

Now,  

area of the wall to be painted = Area of the room - (Area of the window +Area of the door)  

=20−(1.5+2.25)

=20−3.75

=16.25$m^{2}$

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Answer 2

Answer:

₹150

Step-by-step explanation:

Area of wall -Area of window - Area of door

20m^2 - 2m^2 - 3m^2

Area of wall = 15m^2

cost of painting a wall = 15*10

cost of painting a wall = ₹150