Question

find the length of diagonal of rectangle whose sides are 16 cm and 12 CM

Answer 1

We know that,
diagonal of rectangle =

$\sqrt{(l) {}^{2} } + (b) {}^{2}$
$\sqrt{(16) {}^{2} } + (12) {}^{2}$
$\sqrt{256} + 144$
$\sqrt{400}$
$20cm$
so, the diagonal of rectangle is 20 cm.