Question 21
An ant climbs from C to A along CA, then descends from A to B along the stairs shown. What is the ratio of the ascending length to the descending length?

Original printed options: (A) $1$; (B) $1/2$; (C) $1/3$; (D) $\sqrt{2}/2$; (E) $\sqrt{3}/32$.
Source printing issue: option E is printed as √3/32, not √3/3. The derivation gives √3/3, so none of the printed choices is correct. The original choices are preserved. This item uses a verified short answer, √3/3, rather than a letter choice.

Original printed options: (A) $1$; (B) $1/2$; (C) $1/3$; (D) $\sqrt{2}/2$; (E) $\sqrt{3}/32$.
Source printing issue: option E is printed as √3/32, not √3/3. The derivation gives √3/3, so none of the printed choices is correct. The original choices are preserved. This item uses a verified short answer, √3/3, rather than a letter choice.