Question

if the recommended daily allowance (rda) for vitamin c is 60 mg per day and there are 70 mg of vitamin c per 100 g of orange, how many 3.0 oz. oranges would you have to eat each week to meet this requirement?

Answer 1

Recommended daily allowance (RDA) is the nutritional requirement and uptake of the food. One has to eat 7 oranges each week so as to meet the requirement.

What is RDA?

RDA is the recommended daily allowance that defines the level of the essential nutrients that a person consumes for a healthy lifestyle that is defined by Food and Nutrition so as to meet the required nutrient amount.

Given,

RDA of vitamin C = 60 mg/day

100 gm orange = 70 mg Vitamin C

So for one week, it is calculated as:

7 × 60 = 420 mg

The vitamin C in 100 gm oranges = 0.0007 and 1 oz = 28.3495 grams.

So, 3 oz = 3 × 28.3495 grams = 85048.5 mg

The amount of vitamin C in 85048.5 mg is calculated as:

0.0007 × 85048.5 = 59.53 mg

Number of oranges to be consumed each week = 420 ÷ 59.53 =7

Therefore, 7 oranges must be consumed in a week.

Learn more about RDA, here:

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