Question

length, breadth and height of room are 15m,12m and 8m, respectively. find the cost of white washing the room at the rate of rupees 8per m²,if it has a door measuring 4×1.5 and two windows each measuring 3m×2m.​

Answer 1

Answer:

length =15 m,

breadth=12 m,

height =8 m.

So,volume of cuboid(room)=lxbxh

=(15*12*8)m

-1440 m

Again,

length = 4 m

breadth =1.5 m.

So,area of rectangle( door )=Ixb

= (4x1.5)m

=6.0 m

Now,

length =3 m

breadth =2.5 m.

So, area of window=lxb

= (3x2.5)m

=7.50 m.

..area of the room=(1440+6+7.5)m^2

=1453.50 m^2

So,cost of white washing =1453.50×8

= Rs.11628 ...