Question 62
A sphere of $r = 15~\mathrm{cm}$ raggio is appoggiata su due binari distanti fra loro $24~\mathrm{cm}$ como en figura. If the sphere makes a complete rotation, how much does its binary advance?
- $24~\mathrm{cm}$
- $30~\mathrm{cm}$
- $15\pi~\mathrm{cm}$
- $18\pi~\mathrm{cm}$
- $30\pi~\mathrm{cm}$
