To make a smoothie Laura added 320 g of water to 80 g of oatmeal 100 g of mango and some protein powder if the smoothie weigh 520 g how much protein powder did she add A 200 grams B 3 grams C 20 grams D 430 grams

Answer 1

To find out how much protein powder Laura added, we can set up the equation based on the total weight of the smoothie.

Let's denote the weight of the protein powder as \( x \).

The total weight of the smoothie is given as 520 g, and we know the weights of the other components:

• Water: 320 g
• Oatmeal: 80 g
• Mango: 100 g

We can write the equation:

\[ 320 , \text{g (water)} + 80 , \text{g (oatmeal)} + 100 , \text{g (mango)} + x , \text{g (protein powder)} = 520 , \text{g} \]

Now, simplify the left side:

\[ 320 + 80 + 100 + x = 520 \]

Calculating the sum of the known weights:

\[ 500 + x = 520 \]

Now, subtract 500 from both sides:

\[ x = 520 - 500 \] \[ x = 20 \]

So, Laura added 20 grams of protein powder. The correct answer is C 20 grams.