GCSE AQA Biology Organisation: Digestion: How much more milk would a typic

How much more milk would a typical adult have to drink to get their RDA for calcium compared with the amount of milk needed to get their RDA for vitamin B-12? Calculating the volume of milk needed for calcium: RDA for calcium = 1000 mg Amount of calcium per 500 cm³ of milk = 605 mg Using the formula: Volume of milk for calcium = $ \frac{500 \text{ cm}^3 \times 1000 \text{ mg}}{605 \text{ mg}} \approx 826.45 \text{ cm}^3 $ Calculating the volume of milk needed for vitamin B-12: RDA for vitamin B-12 = 2.4 μg Amount of vitamin B-12 per 500 cm³ of milk = 4.5 μg Using the formula: Volume of milk for vitamin B-12 = $ \frac{500 \text{ cm}^3 \times 2.4 \text{ μg}}{4.5 \text{ μg}} \approx 266.67 \text{ cm}^3 $ Finally, the additional milk needed for calcium: Additional milk = Volume for calcium - Volume for vitamin B-12 Additional milk = 826.45 cm³ - 266.67 cm³ = 559.78 cm³. - AQA - GCSE Biology - Question 7 - 2018 - Paper 1

Question 7

$How-much-more-milk-would-a-typical-adult-have-to-drink-to-get-their-RDA-for-calcium-compared-with-the-amount-of-milk-needed-to-get-their-RDA-for-vitamin-B-12?--Calculating-the-volume-of-milk-needed-for-calcium:-RDA-for-calcium-=-1000-mg-Amount-of-calcium-per-500-cm³-of-milk-=-605-mg--Using-the-formula:-Volume-of-milk-for-calcium-=-$-\frac{500-\text{-cm}^3-\times-1000-\text{-mg}}{605-\text{-mg}}-\approx-826.45-\text{-cm}^3-$--Calculating-the-volume-of-milk-needed-for-vitamin-B-12:-RDA-for-vitamin-B-12-=-2.4-μg-Amount-of-vitamin-B-12-per-500-cm³-of-milk-=-4.5-μg--Using-the-formula:-Volume-of-milk-for-vitamin-B-12-=-$-\frac{500-\text{-cm}^3-\times-2.4-\text{-μg}}{4.5-\text{-μg}}-\approx-266.67-\text{-cm}^3-$--Finally,-the-additional-milk-needed-for-calcium:-Additional-milk-=-Volume-for-calcium---Volume-for-vitamin-B-12-Additional-milk-=-826.45-cm³---266.67-cm³-=-559.78-cm³.-AQA-GCSE Biology-Question 7-2018-Paper 1.png$

How much more milk would a typical adult have to drink to get their RDA for calcium compared with the amount of milk needed to get their RDA for vitamin B-12? Calcu... show full transcript

Worked Solution & Example Answer:How much more milk would a typical adult have to drink to get their RDA for calcium compared with the amount of milk needed to get their RDA for vitamin B-12? Calculating the volume of milk needed for calcium: RDA for calcium = 1000 mg Amount of calcium per 500 cm³ of milk = 605 mg Using the formula: Volume of milk for calcium = $ \frac{500 \text{ cm}^3 \times 1000 \text{ mg}}{605 \text{ mg}} \approx 826.45 \text{ cm}^3 $ Calculating the volume of milk needed for vitamin B-12: RDA for vitamin B-12 = 2.4 μg Amount of vitamin B-12 per 500 cm³ of milk = 4.5 μg Using the formula: Volume of milk for vitamin B-12 = $ \frac{500 \text{ cm}^3 \times 2.4 \text{ μg}}{4.5 \text{ μg}} \approx 266.67 \text{ cm}^3 $ Finally, the additional milk needed for calcium: Additional milk = Volume for calcium - Volume for vitamin B-12 Additional milk = 826.45 cm³ - 266.67 cm³ = 559.78 cm³. - AQA - GCSE Biology - Question 7 - 2018 - Paper 1

Step 1

How much more milk would a typical adult have to drink to get their RDA for calcium compared with the amount of milk needed to get their RDA for vitamin B-12?

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Answer

To determine the amount of milk needed for RDA of calcium:

Calculate milk for calcium:
- RDA for calcium = 1000 mg
- Milk provides 605 mg in 500 cm³.
- Therefore, the volume needed is: $\text{Volume for calcium} = \frac{500 \text{ cm}^3 \times 1000 \text{ mg}}{605 \text{ mg}} \approx 826.45 \text{ cm}^3$
Calculate milk for vitamin B-12:
- RDA for vitamin B-12 = 2.4 μg
- Milk provides 4.5 μg in 500 cm³.
- Therefore, the volume needed is: $\text{Volume for vitamin B-12} = \frac{500 \text{ cm}^3 \times 2.4 \text{ μg}}{4.5 \text{ μg}} \approx 266.67 \text{ cm}^3$
Finally, compute the additional amount of milk needed:
- Additional milk needed = Volume for calcium - Volume for vitamin B-12
- Additional milk = 826.45 cm³ - 266.67 cm³ = 559.78 cm³.

How much more milk would a typical adult have to drink to get their RDA for calcium compared with the amount of milk needed to get their RDA for vitamin B-12?

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