It's a one mark MC question from OCR Oct 2020.
Can't figure out how the correct answer is apparently 1.1x10^7 m/s
An electron with initial kinetic energy of 100 eV and initial speed of 5.9 × 10^6 m/s is accelerated through a potential difference of 250 V. What is the final speed of this electron?
Of course eV=1/2mv^2 and 100eV does result in 5.9 × 10^6 m/s so they seem to have given excess information.
For 1 mark what am I missing?
The difference from the usual scenario is that the electron is not stationary.