The dimension of a room are 5m 4m and 3M the area of the window on a wall is 3 m square A 4 litre paint can cover 36 m square and you need to paint the ceiling and walls with double coat how many four litre cans of paint are needed.
Answers
Answer:
Number of four litre cans of paint are needed = 4 cans
Step-by-step explanation:
The dimension of a room are 5m 4m and 3m .
Thus, Length of room ,L = 5 m
Breadth of room , B = 4 m
Height of room , H = 3 m
So, total surface area of room excluding floor = (L * B) + [2 * H * (L + B)]
= (5 * 4) + [2 * 3 * (5 + 4)]
= 20 + 54
= 74 m²
Also, the area of the window on a wall = 3 m²
=> total area to be covered by paint = 74 - 3
= 71 m²
For double coat total area to be covered = 71 * 2
= 142 m²
Here, it is given that -
A 4 litre paint can cover = 36 m²
=> Number of four litre cans of paint are needed = 142/36
= 4 cans