A room is 6m long ,5m wide and 4m high . The doors and windows in the room occupy 4 square meters of space . Find the cost of wall papering the remaining portion of the walls with paper 75 cm wide at the rate of Rs 2.40 per meter . [ HINT : DOORS AND WINDOWS ARE NOT WALL PAPERED ]
Answers
Answer:
460.8 RS
Step-by-step explanation:
AREA OF ROOM=2*6*5+2*5*4+2*4*6
=60+40+48
=148M^2
WALL TO BE PAPERED=144M^2
PAPER TO BE USED=14400/75
= 192 PAPERS
COST= 192*2.40
=460.8 RS
The cost of the wallpapering is 288 Rs.
Given:
A room is 6m long, 5m wide and 4m high.
The doors and windows in the room occupy 4 square meters of space
To find:
Find the cost of wallpapering the remaining portion of the walls with paper 75 cm wide at the rate of Rs 2.40 per meter.
Solution:
Formula used:
Total surface area of the walls = 2× (Length × height + width × height) - area of doors and windows
From the data,
Length of room = 6 m
Width of room = 5m
Height of room = 4m
Hence,
The total surface area of the walls
= 2× (6 × 4 + 5 × 4) - 4 m²
= 2 (44) - 4 = 84 m²
From the data,
The width of the wallpaper is 75 cm = 0.7 meter
Let 'x' be the length of the wallpaper
Hence, the Area of wallpaper = 0.7 × x = 0.7x m²
Here the area of paper must be equal to the surface area of the walls
=> 0.7x m² = 84 m²
=> x = 120
The rate of cost wallpapering is 2.40 per meter
Cost of the total wallpaper = 120 × 2.40 = 288 Rs.
Therefore,
The cost of the wallpapering is 288 Rs.
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