Sound — practice question

A student calculates that sound takes $0.33\ \text{s}$ to move $100\ \text{m}$. Using this information, what is the speed of sound?

• A$30\ \text{m s}^{-1}$
• B$60\ \text{m s}^{-1}$
• C$300\ \text{m s}^{-1}$
• D$600\ \text{m s}^{-1}$