9514 1404 393
Answer:
£27.50
Step-by-step explanation:
The general approach is ...
- find the area to be painted
- figure the amount of paint required
- determine the discounted cost of the paint
1. The area to be painted will be the area of the four walls, less the area of the door (which is assumed to be a hole in the wall, so is not painted).
Each wall has the same dimensions, so the same area. The area of the rectangular wall is ...
A = LW
A = (3.5 m)(2.6 m) = 9.1 m²
The area of the door is ...
A = (2.2 m)(0.8 m) = 1.76 m²
Then the area to be painted is the area of the 4 walls less the area of the door:
painted area = 4(9.1 m²) -1.76 m² = 34.64 m²
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2. Each 2 L tin of paint will cover (2 L)×(8 m²/L) = 16 m², so the number of tins needed is ...
(34.64 m²)/(16 m²/tin) = 2.165 tins
We assume this means Aisha will need to purchase 3 tins, since she will need more paint than is provided by 2 tins.
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3. Because of the price offer on the paint, Aisha will pay full price for the first two tins, half price for the 3rd tin. That is, she will pay 2 1/2 times the full price of a tin when she buys the 3 tins of paint she needs. Each tin costs £11, so Aisha will pay ...
(2 1/2)(£11) = £27.50
Aisha will pay £27.50 for the paint to paint her living room.
