How do I find the voltage across the capacitor?
Since this appears to be homework we won't give you a direct answer but guide you through it.

First edit your question to write the equation relating capacitance, charge and voltage.
Hint: current is the rate of flow of electric charge past a point. What mathematical function can you perform on equation 1 to relate the change in voltage as a function of the current and time?

Edit your post with your work and see if that prompts you enough to complete the task.