The length breadth and height of a room are 18m , 15m and 12m respectively. It has 2 doors , each 6m by 3m and 3windows each 4m by 2m . Find the cost of white washing its walls at 75 paise per square meter
Answers
Answer:
Here is your answer mate ☺️☺️
Step-by-step explanation:
It is given that length, breadth and height of a room are 8 m, 5 m and 3 m respectively.
Area of four walls of the room is: 2h(l+b)
A=2h(l+b)=2×3(8+5)=6×13=78 m
2
Area of the ceiling is:
A=l×b=8×5=40 m
2
Total area of the four walls and the ceiling of the room is 78+40=118 m
2
It is given that cost of white washing is Rs.15/m
2
, therefore,
Total cost of white washing is:
118×15=1770
Hence, the cost of white washing the walls is Rs.1770.
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Answer:
Rs. 549
Step-by-step explanation:
Given:-
Length of a room= 18metres
Breadth of the room = 15 metres
Height of the room= 12 metres
Area of a door=(6×3)m²
= 18 m²
Therefore, Total area of 2 doors
= (18×2)m²
= 36 m²
Area of a window= (4×2) m²
= 8m²
Therefore, Total area of the 3 windows=(8×3)m²
= 24 m²
Total area of 2 doors and 3 windows together=60m²
Area of the walls =2×(18+15)×12
=792 m²
Therefore, Area of the walls excluding the doors and the windows= (792-60) m²
=732 m²
Cost of white washing 1 m² = 75 paisa
Therefore,Cost of white washing 732m² =(75×732)
=54900 paise
=Rs 549
Hope it helps!