the dimensions of a room are 9m 8m 6.5 m. it has three windows of 1.5 m×1m and one door of 2m×1.5 m. what will be the
Answers
Answer: 215 sq. meter
Step-by-step explanation: Area of walls - ( 1 gate + 2 windows )
=2 ( bh + hl ) - [ 2* 1.5 + 2 ( 1.5 * 1)]
=2 ( 8 * 6.5 + 6.5 * 9 ) - ( 3 + 3 )
=2 ( 52 +58.5 )- 6
=2 * 110.5 - 6
=221 - 6
=215 sq. meter
Answer:
Dimensions of the door -
Length of the door = 3 m
Breadth of the door = 1.5 m
Dimensions of the wall including door -
Length of the wall = 8 m
Breadth of the wall = 5.5 m
• To find
The cost of white washing the wall at the rate of rs 12 per meter square
• Concept -
Firstly, we will find the area of the door and then the area of wall including the door.
To find the area of the door,
Subtract area of door from area of wall including the door.
Now, to find the cost multiply the area of door with Rs.20
• Solution
Area of the door = Length × breadth
⟶ 3 × 1.5
⟶ 4.5 m²
Area of the door = 4.5 m²
Area of wall including door = length × breadth
⟶ 8 × 5.5
⟶ 44 m²
Area of wall including door = 44 m²
Area of door = Area of wall including door - Area of door
⟶ (44 - 4.5) m²
⟶ 39.5 m²
Area of door = 39.5 m²
The cost of white washing the wall at the rate of Rs. 12 per meter square = 39.5 × 12 = Rs. 474
Cost of white washing the wall at the rate of Rs. 12 per m² = Rs. 474
Step-by-step explanation: