Question

the length, breadth and height of a room is 5m,4m and 3m respectively. find the cost of white washing the wall of the room and the celling at the rate of 7:50 per square metre ​

Answer 1

Answer:

l=5m

b=4m

h=3m

lsa+l*b=2*(l+b)*h+l*b

           =2*(5+4)*3+5*4

            =2*9*3+20

             =54+20

                =74

cost of white washing 1m=rs 7.5

cost of 74m=7.5*74=rs555