Energy, work and power — practice question

A boy has an average useful power output of $60\,\text{W}$ while he rides his bicycle for $2.0\,\text{minutes}$. What useful energy is transferred?

• A$0.50\,\text{J}$
• B$30\,\text{J}$
• C$120\,\text{J}$
• D$7200\,\text{J}$