21. A room measures 6 m by 5 m by 4 m. Find the
paint required in litres, to paint the walls with
2 coats of paint if a litre of paint is used to cover
18 m² in 1 coat. The windows and doors occupy
10% of the wall area.
ny
Answers
Given : A room measures 6 m by 5 m by 4 m.
a litre of paint is used to cover 18 m² in 1 coat.
The windows and doors occupy 10% of the wall area.
To Find : the paint required in litres, to paint the walls with
2 coats of paint
Solution:
room measures 6 m by 5 m by 4 m.
=> Wall area = 2(6 + 5) * 4
=> Wall area = 8 * 11
=> Wall area = 88 m²
windows and doors occupy 10% of the wall area. = (10/100)88
= 8.8 m²
Area to be painted = 88 - 8.8
= 79.2 m²
paint the walls with 2 coats of paint = 2 * 79.2
= 158.4 m²
18 m² can be painted in 1 Litre
1 m² can be painted in 1/18 Litre
158.4 m² can be painted in 158.4/18 Litre
= 8.8
8.8 litre paint is required
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Answer:
room measures 6 m by 5 m by 4 m.
=> Wall area = 2(6 + 5) * 4
=> Wall area = 8 * 11
=> Wall area = 88 m²
windows and doors occupy 10% of the wall area. = (10/100)88
= 8.8 m²
Area to be painted = 88 - 8.8
= 79.2 m²
paint the walls with 2 coats of paint = 2 * 79.2
= 158.4 m²
18 m² can be painted in 1 Litre
1 m² can be painted in 1/18 Litre
158.4 m² can be painted in 158.4/18 Litre
= 8.8
8.8 litre paint is required
Step-by-step explanation: