College Physics (4th Edition)

The amount of water that spills over the top of the glass is $1.69~mL$
We can find the change in volume due to the increase in temperature: $\Delta V = \beta~\Delta T~V$ $\Delta V = (210\times 10^{-6}~K^{-1})(30.0~K)(268.4~mL)$ $\Delta V = 1.69~mL$ The amount of water that spills over the top of the glass is $1.69~mL$