A room is 10m long ,8 m wide and 4.5 m high . It has two doors ,each measuring 2m by 1.2m and three windows,each measuring 2.5m by 1.8 m .find the cost of white washing it's four walls at rs 4.40 per sq m.
Answers
The cost of whitewashing it's four walls at Rs. 4.40 per sq m is 652.08 m².
Step-by-step explanation:
Step 1:
The length of the room, l = 10 m
The breadth of the room, b = 8 m
The height of the room, h = 4.5 m
∴ Area of the walls of the room including the doors and windows = 2h[l+b] = 2*4.5 [10+8] = 162 m² …… (i)
Step 2:
It is given that,
Dimensions of two doors = 2 m x 1.2 m each
So, Area of 2 doors = 2 * [l*b] = 2 * 2 * 1.2 = 4.8 m² ….. (ii)
And,
Dimensions of three windows = 2.5 m x 1.8 m each
So, Area of 3 windows = 2 * [l*b] = 2 * 2.5 * 1.8 = 9 m² ….. (iii)
Step 3:
From (i), (ii) & (iii), we get
Area of 4 walls excluding the doors and windows is,
= [Area of the walls of the room including the doors and windows] – [Area of 2 doors] – [Area of 3 windows]
= 162 – 4.8 – 9
= 148.2 m²
The cost of whitewashing the four walls of the room is given as = Rs 4.40 per sq m
Thus,
The cost of whitewashing the four walls of the room (excluding the doors and windows) is,
= 148.2 * Rs. 4.40
= Rs. 652.08
-------------------------------------------------------------------------------
Also View:
A room is 8.5 m long 6.5 m broad and 3.4 m high it has two doors each measuring 1.5 my by 1m and two windows each measuring 2m by 1m .find the cost of painting its four walls at rupees 160 per metre square ?
https://brainly.in/question/1098391
A room is 9 M long 8 M broad and 6 m high it has to door each of size 3 metre ❌ 1.5 metre and 4 Windows each of size 1.5 m ❌ 1 m find the cost of whitewashing the walls of the room at the rate of rupees 1.75 per square metre ?
https://brainly.in/question/2245783
Answer: