Answer
$$l = \frac{2}{3}(2\sqrt{2}-1)$$
Work Step by Step
$$y'=x^\frac{1}{2}$$
$$l = \int_{0}^{1}\sqrt{1+{(\sqrt{x})}^2}dx$$
$$l = \int_{0}^{1}\sqrt{1+x}dx$$
$$l = [\frac{2}{3}{(1+x)}^\frac{3}{2}]_{0}^{1}$$
$$l = \frac{2}{3}(2\sqrt{2}-1)$$
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