The Bambanani Crèche in Bethlehem bought the cube blocks below from an auction - NSC Mathematical Literacy - Question 3 - 2019 - Paper 1

Calculate the area of the circular hole:

Calculating:

• Area of one circular hole = 282.63 cm²
• There are 2 holes: $2 imes 282.63 ext{ cm}^2 = 565.25 ext{ cm}^2$

Next, calculate the area of the four faces without holes:

• $4 ext{ faces} imes 2025 ext{ cm}^2 = 8100 ext{ cm}^2$

Now sum these areas:

Total Area = Area of faces without holes + Area of faces with holes

Next, calculate the total surface area for all 12 chairs:

$ext{Total Surface Area for 12 chairs} = 12 imes 11,582.869 = 139,094.43 ext{ cm}^2$

Final total = 11 582.869 cm².

First, convert the spread rate into consistent units:

1,8 m² = 18 000 cm²

Now calculate how much paint is needed for 12 chairs:

Total area needing paint for 12 chairs = 11,582.869 cm²

Now find the amount of paint:

The diameter of the tin can be calculated using the formula:

Given the volume of the tin:

We know 5,000 cm³ = $3.142 imes 49 ext{ cm}^2 imes ext{height}$.

Rearranging gives:

height = rac{5000}{3.142 imes 49} = ext{approximately } 32.48 ext{ cm.}

For a 37-year-old man with a WHR of 0.95, according to the classification:

• A WHR in the range of 0.84 to 0.94 is categorized as moderate risk.
• Therefore, a WHR of 0.95 indicates a high risk of obesity.

To calculate the WHR, we use the formula:

Thus, this man's WHR is approximately 1.14.

The woman is classified as moderate risk due to her WHR of 0.7826, suggesting she could belong to the age group of 30 - 39 years.

Given WHR:

Rearranging gives:

Thus, rounding gives a hip measurement of 92 cm.