How to divide html page in two columns?

Question

I am trying to divide my html page into two columns. One column is supposed to be filled by an image and other by text. I am facing below issues:

1. Columns not occupying the exact 50-50 width.

2. There is a thin margin from left before the image starts. Need to remove that margin.

3. There is a huge gap between the two columns.

It will be really helpful if someone can look at this code and suggest corrections:

.container img {
  width: 100%;
}

.thin-black-border {
  border-color: black;
  border-width: 05px;
  border-style: solid;
}

.header {
  font: 200 80px'Oleo Script', Helvetica, sans-serif;
  color: #2b2b2b;
  text-shadow: 4px 4px 0px rgba(0, 0, 0, 0.1);
}

<link href='http://fonts.googleapis.com/css?family=Oleo+Script' rel='stylesheet' type='text/css'>
<div style="width:100%; height: 100px;background-color:green" class="bg-faded">
  <!-- Main Div -->
  <h1 class="text-center header">Madhubala</h1>
</div>
<div style="float:left;width:50%;" class="container">
  <img src="https://nehamalude.files.wordpress.com/2011/02/madhubala.jpg" class="thin-black-border" />
</div>
<div style="float:left; width:50%; background-color:red; ">
  Right
</div>

Answer 1

You can simply use table : Method 1:

<table border="1">
  <tr>
    <td>You can add content here</td>
    <td>You can add content here</td>
  </tr>
</table>

Method 2:

<div style="display:block; width:100%;">
  <div style="width:50%; float: left; display: inline-block;">Your content</div>
  <div style="width:50%; float: left; display: inline-block;">Your content</div>
</div>

Method 3 ( Using Flex ) :

    <div class="flexbox-container" style="display:flex;">
        <div class="sidebar" style="flex:1;">Test column 1</div>
        <div class="main" style="flex:1;">Test column 2</div>
    </div>