Question

A rectangular room is 6m long, 5m wide and 3.5m high.It has 2 doors of size 1.1m by 2m and 3windows of size 1.5m by 1.4m .Find cost of white washing walls and ceiling of room at rate of Rs. 5.30 per square metre

Answer 1

Answer:

351.39

Step-by-step explanation:

L=6 m, b=5m, h=3.5m

area of 4 walls={2(l+b)xh} sq. units

={2(6+5)x3.5}m² =22x35/10

=77m²

area of 2 doors =2(1.1x2)m

=2*2.2=4.4m²

area of 3 windows =3(1.5x1.4)=3x2.1

=6.3m²

total area of 2 doors and 3 windows=4.4+6.3

=10.7m²

area of white washed=77m²-10.7m²=66.3m²

rate of white washing per m² =Rs 5.30

rate of white washing 66.3m²=66.3x5.30

=Rs 351.39