Question

the length, breadth and height of a room are 5 m 4m and 3m respectively .Find the cost of white washing the walls of the room and ceiling at the rate of 7.50per msquare
​

Answer 1

Answer:

Solution:-

As the room is in the shape of cuboid,you need to divide that into two equations.

Step-by-step explanation:

step 1:- First multiply and find out the area of walls,find out the area of two walls and multiply them by 2,as follows

(length x height) + (breadth x height)

5 x 3 + 4 x 3 =15 + 12 = 27m^2

now multiply the sum with 2,27 x 2 =54m^2,So now you got the area of walls -1

step 2 :-find out the area of ceiling

(length x breadth) = 5 x 4 = 20m^2 -2

step 3 :- Now add 1 and 2

=27 + 54 = 81m^2

step 4 :-Now multiply the cost per 1 m square and th total area

7.50 x 81 = 607.5

Therefore the cost of white washing the walls and ceiling is 607.5rs

hope this helps but sorry for the lag