JSFiddle - React, Tailwind, and code Playground

HTML

<div id="passageDiv">passageDiv</div>
<div id="questionDiv ">questionDiv </div>

CSS

#passageDiv, #questionDiv {
    overflow: auto;
    float: left;
    height: 50px;
    width: 50%;
}

#passageDiv {
    border-right: 1px solid #ccc;
}