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Sagot :
The minimum number of bricks Salah will have to buy is 4050 bricks
How to find the minimum number of bricks Salah will have to buy?
Given that the
- width of the garden is w = 17 feet and
- length l = 40 feet.
- Also, the walkway iis 18 feet wide.
So, the length of walkway plus garden, L = 40 ft + 18 ft = 58 ft. The width of walkway plus garden, W = 17 ft + 18 ft = 35 ft.
The area of the walkway
We now need to find the area of the walkway.
Area of walkway, A" = area of walkway plus garden - area of garden
= LW - lw
= 58 ft × 35 ft - 40 ft × 17 ft
= 2030 ft² - 680 ft²
= 1350 ft²
Now, since each brick is 6 inches wide and 8 inches long, the area of each brick is A' = 6 in × 8 in = 48 in²
So, the number of bricks required, n = area of walkway/area of brick
= 1350 ft²/48 in²
= 1350 × 144 in²/48 in²
= 194400 in²/48 in²
= 4050 bricks
So, the minimum number of bricks Salah will have to buy is 4050 bricks
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