Question

Brainliest reward …… please quick

Answer 1

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.

Answer 2

Answer:

3 boxes of fertilisers.

Solving steps:

Part A:

Area of the garden, rectangle:

Length * Width

12 * 7

84 m²

Area of patio:

$\sf{\frac{1}{2} * base *height$

$\sf{\frac{1}{2} * 6*3$

$\sf{9$ 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    ↔ $\sf{ \frac{1}{32}$ box

75 m²  ↔ $\sf{ \frac{1}{32} *75$ boxes

75 m²  ↔ 2.34375 boxes

• As she cannot buy exact 2.34375 boxes.

She should buy 3 boxes of fertilisers.