bootstrap table not taking full width code example

Example: bootstrap table col fixed width

<table class="table">
  <thead>
    <tr>
      <th style="width: 30%">Col 1</th>
      <th style="width: 20%">Col 2</th>
      <th style="width: 10%">Col 3</th>
      <th style="width: 30%">Col 4</th>
      <th style="width: 10%">Col 5</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Val 1</td>
      <td>Val 2</td>
      <td>Val 3</td>
      <td>Val 4</td>
      <td>Val 5</td>
    </tr>
  </tbody>
</table>