ared and by how much?s. A door of breadth Im and height 2 m is fitted

1.	ared and by how much?s. A door of breadth Im and height 2 m is fitted in a wall. The length of the wall45 m and the height is 3.6 m. Find the cost ofof white washing the wall is 20 per m2.
Answer» A door of breadth 1 metre and height 2 metre ∴area of the door = [length * breadth] =[1 m2m] =2m^2 the length of the wall is 4.5 M and the height is 3.6 ∴area of the wall = [length breadth] = [4.5m3.6m]=16.2 m^2 ∴area to be painted = [area of the wall - area of the door ] ∴area to be painted= [16.2 m^2 - 2m^2 ] = 14.2m^2 the rate of whitewashing the wall is 20 rupees per metre square = Rs 14.2m^2 20 = Rs 284 ANS

ared and by how much?s. A door of breadth Im and height 2 m is fitted in a wall. The length of the wall45 m and the height is 3.6 m. Find the cost ofof white washing the wall is 20 per m2.

Answer»

A door of breadth 1 metre and height 2 metre

∴area of the door = [length * breadth] =[1 m*2m] =2m^2

the length of the wall is 4.5 M and the height is 3.6

∴area of the wall = [length * breadth] = [4.5m*3.6m]=16.2 m^2

∴area to be painted = [area of the wall - area of the door ]

∴area to be painted= [16.2 m^2 - 2m^2 ] = 14.2m^2

the rate of whitewashing the wall is 20 rupees per metre square

= Rs 14.2m^2 *20 = Rs 284 ANS