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Using the following HTML and CSS example, what will equivalent pixel value be for .em and .rem elements?

html {
  font-size: 10px;
}
body {
  font-size: 2rem;
}
.rem {
  font-size: 1.5rem;
}
.em {
  font-size: 2em;
}
<body>
  <p class="rem"></p>
  <p class="em"></p>
</body>