Question

A room 9 m long, 6 m broad and 3.6 m high has one door 1.4 m by 2 m and two windows, each 1.6 m by 75 cm. Find:
(i)The area of 4 walls, excluding doors and windows
(ii) the cost of white-washing the walls from inside at the rate of Rs. 22.50 per m²
(iii) the cost of painting it's ceiling at Rs. 25 per m²​

Answer 1

Answer:

Here is your answer....

Answer 2

Answer:

2(lb+bh) is the area of 4 sides of the room 2(lb+bh)-[(1.4×2)+(2×1.6×0.75)]

2(9x6+6*3.6) - [2.8+2.4]

2(54+21.6) - (5.2)

2(75.6)-5.2

151.2-5.2

146