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Aunt Abby will bake the wedding cake - NSC Mathematical Literacy - Question 3 - 2018 - Paper 1

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Aunt Abby will bake the wedding cake. She will be using a recipe from a recipe book published in England. NOTE: • 1 kg = 2.25 pounds • 1 m flour = 0.7 kg flour 3.2... show full transcript

Worked Solution & Example Answer:Aunt Abby will bake the wedding cake - NSC Mathematical Literacy - Question 3 - 2018 - Paper 1

Step 1

3.2.1 Aunt Abby needs 3 and a half pounds of butter.

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Answer

To convert pounds to kilograms, we use the conversion factor:

1 kg = 2.25 pounds.

Let:

  • x = mass in kg
  • 3.5 pounds = 3.5 / 2.25 kg = 1.5556 kg.

Thus, Aunt Abby needs approximately 1.56 kg of butter.

Step 2

3.2.2 If Aunt Abby needs 625 ml of flour, determine the mass of the flour in grams.

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Answer

Since 1 m of flour equals 0.7 kg, we convert the amount:

0.625 liters (625 ml) = 625 grams (as 1 liter of water weighs approximately 1000 grams).

Thus, the mass of the flour in grams is:

625 g (\times 0.7 = 437.5 g).

Therefore, Aunt Abby needs approximately 437.5 grams of flour.

Step 3

3.2.3 The cake should be baked at 356 °F. Determine what degree Celsius the oven should be turned.

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Answer

Using the conversion formula:

[ °C = (°F - 32) \times \frac{5}{9} ]

Substituting 356 for °F:

[ °C = (356 - 32) \times \frac{5}{9} = 180 °C ]

Therefore, the oven should be set to 180 °C.

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