• # question_answer Average length of all vertical chords of the curve $y=\sqrt{4-{{x}^{2}}}$is A) $\frac{\pi }{2}$ B)  $\frac{\pi }{4}$ C) $\frac{\pi }{6}$ D) $\pi$

 $y=\sqrt{4-{{x}^{2}}}$ $}_{\text{avg}}}=\frac{\int\limits_{-\,2}^{2}{\sqrt{4-{{x}^{2}}}}dx}{4}$