Question

a rectangular room is 6m long ,5m wide and 3.5 m high.it has 2 doors of size 1.1 m by 2m and 3 windows of size 1.5 m by 1.4 m. find the cost of white washing the walls and the ceiling of the room at the rate of ₹5.30 per square metre​

Answer 1

Answer:

499.79 rupees

Step-by-step explanation:

Area to be white washed=(6×5×3.5)-(2(1.1×2)+3(1.5×1.4))

=105-(4.4+6.3)

=105-10.7

=94.3 m^2

Cost of white washing=Area to be white washed×Cost per one square meter

=94.3×5.30

=499.79 rupees

Answer 2

Answer:

Dimensions of room= 6*5*3.5 m^3

Dimensions of window= 1.5*1.4 m

Dimension of door=1.1 m* 2m

Area of walls= 2h ( l+b ) - ( 6.3+4.4)

= 77-10.7

=66.3 m^2

Area of ceiling = lb = 6*5 = 30 m^2

Total area = 66.3+40= 96.3 m^2

Cost on white washing= ₹5.3/m^2

Total cost=area * cost

= 96.3 * 5.3

= ₹510.39

I HOPE I AM RIGHT