Card image width not equal when I gave max-height

Question

I am making a card with equal image size and text. I had given max-height to the image. but the images are not equal in size. I will give my code below. I am attaching my website's snap for better reference. In this project, I am using HTML, CSS and BOOTSTRAP4

Problem is : Image

  .kbcard {
        box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
        max-width: 300px;
        margin: auto;
        text-align: center;
        font-family: arial;
    }

    .kbtitle {
        color: grey;
        font-size: 18px;
    }

    a .kb{
        text-decoration: none;
        font-size: 22px;
        color: black;
    }

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
 

<div class="row">
    <div class="col-md-3">
        <div class="kbcard">
            <img src="https://www.saintleuparis.catholique.fr/IMG/arton691.jpg?1467978372" alt="John" style="max-width:300px">
            <h1>John Doe</h1>
            <p class="kbtitle">CEO & Founder, Example</p>
            <p>Harvard University</p>

        </div>

    </div> 
    <div class="col-md-3">
        <div class="kbcard">
            <img src="https://www.saintleuparis.catholique.fr/local/cache-vignettes/L187xH270/images-74-b67fc.jpg?1468002198" alt="John" style="max-width:300px">
            <h1>John Doe</h1>
            <p class="kbtitle">CEO & Founder, Example</p>
            <p>Harvard University</p>

        </div>

    </div>
     
</div>

I need : Snap

Answer 1

 img {
        vertical-align: middle;
        border-style: none;
        width: 100%;
        height: 250px;
        object-fit: cover;
    }

try these stylings to your image tag