the length, breadth and height of a room is 5 m, 4 m and 3 m. the cost of white washing it's four walls at the rate of Rs. 7.50 per m^2.
Answers
Step-by-step explanation:
Given:-
the length, breadth and height of a room is 5 m, 4 m and 3 m. the cost of white washing it's four walls at the rate of Rs. 7.50 per m^2.
To find:-
Total cost of white washing its four walls of the room?
Solution:-
Given that
Length of the room (l)= 5 m
Breadth of the room (b)= 4 m
Height of the room (h)=3 m
We know that
Area of the four walls of a room = 2h(l+b) sq.units
On Substituting these values in the above formula
Area of the four walls of the given room
=>2(3)(5+4) sq.m
=>2(3)(9) sq.m
=>54 sq.m
Area of the four walls of the room = 54 m^2
Cost of white washing the four walls of 1 m^2 = Rs. 7.50
Total cost of white washing the four walls of the room of 54 m^2
=>54×Rs. 7.50
=>Rs. 405
Answer:-
Total cost of white washing the four walls of the room of 54 m^2 = Rs. 405
Used formula:-
- Area of the four walls of a room = 2h(l+b) sq.units
Where,
- l= length
- b=breadth
- h=height