Calculate 10% of 2kg: Finding Chocolate Content in Cake

To solve this problem, we'll follow these steps:

• Step 1: Identify the given information
• Step 2: Apply the appropriate formula
• Step 3: Perform the necessary calculations

Now, let's work through each step:

Step 1: The total weight of the cake is $2\, \text{kg}$, and chocolate makes up $10\%$ of this.

Step 2: To find the weight of the chocolate, we use the formula: $\text{Chocolate weight} = \left( \frac{\text{Percentage}}{100} \right) \times \text{Total weight of the cake}$ This is: $\text{Chocolate weight} = \left( \frac{10}{100} \right) \times 2$

Step 3: Performing the calculation: $= 0.1 \times 2 = 0.2$

Therefore, the weight of the chocolate in the cake is $0.2\, \text{kg}$.

Checking the multiple-choice options, the correct choice is the one with $0.2$, which corresponds to choice $4$.