Q: If a person starts Salatul Asr before the time of magrib but his salah overruns into the time of magrib will his Asr prayer be valid?
Example, first 2 rakats in the time of Asar and remaining 2 in the time of magrib.
A: Yes if the asr was started before the sun disappeared completely from the horizon and was completed after it disappeared it will be done, albeit in an incomplete manner.