Respuesta :

fieryanswererft

Answer:

3 boxes of fertilisers.

Solving steps:

Part A:

Area of the garden, rectangle:

Length * Width

12 * 7

84 m²

Area of patio:

[tex]\sf{\frac{1}{2} * base *height[/tex]

[tex]\sf{\frac{1}{2} * 6*3[/tex]

[tex]\sf{9[/tex] m²

Area of grass:

Area of the garden - Area of patio

84 m² - 9 m²

75 m²

Part B:

32 m² ↔  1 box

1 m²    ↔ [tex]\sf{ \frac{1}{32}[/tex] box

75 m²  ↔ [tex]\sf{ \frac{1}{32} *75[/tex] boxes

75 m²  ↔ 2.34375 boxes

  • As she cannot buy exact 2.34375 boxes.

She should buy 3 boxes of fertilisers.

semsee45

Answer:

3

Step-by-step explanation:

First, calculate the total area of the grass by calculating the area of the rectangle and the triangle, and then subtracting the triangle area from the rectangular area:

area of rectangle = width x length

⇒ area of rectangle = 7 x 12 = 84 m²

area of triangle = 1/2 x base x height

⇒ area of triangle = 1/2 x 6 x 3 = 9 m²

total area of the grass = area of the rectangle - area of triangle

⇒ total area of the grass = 84 - 9 = 75 m²

Given one box of fertilizer = 32 m² grass

⇒ boxes of fertilizer needed = area of grass ÷ 32

                                                = 75 ÷ 32

                                                = 2.34375

Therefore, Mrs Kunal will need 3 boxes of fertilizer.  

We need to round up to 3 rather than round down to 2, else she won't have enough to cover the entirey of the grassed area.

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