A radiotherapy machine delivers power of 0.2 J/s. How long will it take to deliver a total energy of 10 J?

The power delivered by the radiotherapy machine ($P$) is $0.2 \, \text{J/s}$.
The total energy required ($E$) is $10 \, \text{J}$.

Power is defined as the rate at which energy is transferred or used:

where $P$ is power, $E$ is energy, and $t$ is time.

The treatment is done for $\text{50 s}$.