Question

A cyclist moves from a certain point $X$ and goes round a circle of radius ${}^{\prime }{r}^{\prime }$ and reaches $Y$, exactly at the other side of the point $X$, as shown in figure. The distance covered by the cyclist would be

• A. $\pi r$
• B. $2\pi r$
• C. $2r$
• D. $2\pi /r$

Answer 1

The correct option is A $\pi r$

The distance is arc of circle.$distance=acr\left(XY\right)=\pi \ast r$