Question

A room is 8m long 6m broad and 5.5m high. It has one door of dimensions 2.5m by 2m and two windows each of dimensions 1.5m by 1m find the cost of whitewashing the walls at rupees 3.20 per square. m.

Answer 1

Answer:

Rs 774.40

Step-by-step explanation:

Find the area of the floor and the ceiling:

Area = 2( Length x Breadth)

Area = 2( 8 x 6) = 96 m²

Find the area of the 4 walls including the door and windows:

Area = 2(Length + Breadth) x height

Area = 2(8 + 6) x 5.5 = 154 m²

Find the area of the 4 walls excluding the door and windows:

Area = 154 - (2.5 x 2) - 2(1.5 x 1) = 146 m²

Find the total area needed to whitewash:

Area = 96 + 146 = 242 m²

Find the cost:

1 m² = Rs 3.20

242 m² = 3.2 x 242 = Rs 774.40

Answer: The cost is  Rs 774.40