altimeter tech question
some of you may recog. this question and where it comes from, but i cannot satisfy myself of the answer. Any offers of explanation please!!
given an indicated altitude of 10,000ft and an actual OAT of -20c, you set your altimeter to a local station setting of 29.62' (about 1003mb i think). If the station elevation is 2500ft, what is your actual altitude?
answer is 9550ft
err. how?