What is the total width of an element, where the content is 100 pixels wide, the left margin is 10 pixels, the right margin is 15 pixels, the padding is 5 pixels, and the border is 0 pixels thick?
The correct answer and explanation is:
The total width of the element is 135 pixels.
Here is the detailed explanation:
The total width of a box in CSS is calculated by adding the content width, padding, border, and margin widths together.
The content width is the width of the actual content inside the element. In this case, it is given as 100 pixels.
Padding is the space between the content and the border. Padding exists on both the left and right sides, so the total padding width is twice the single padding value. Here, padding is 5 pixels, so total padding is 5 + 5 = 10 pixels.
The border is the thickness of the border around the padding and content. It also exists on both sides. In this problem, the border thickness is 0 pixels, so the total border width is 0 + 0 = 0 pixels.
Margin is the space outside the border that separates the element from other elements. The margin values are different on the left and right: 10 pixels on the left and 15 pixels on the right. These add up to 10 + 15 = 25 pixels.
Now, add all these together to get the total width:
- Content width: 100 pixels
- Padding (left + right): 10 pixels
- Border (left + right): 0 pixels
- Margin (left + right): 25 pixels
Total width = 100 + 10 + 0 + 25 = 135 pixels
This means the entire space the element takes horizontally, including the space outside its visible content (padding, border, margin), is 135 pixels wide.
Understanding the total width is important when designing layouts, especially to prevent overlapping or unwanted gaps between elements on a webpage. Different CSS box-sizing rules can affect this calculation, but here the standard box model applies.