题目内容：

Please help me to get the answer!
Aneroid barometers can be used to measure changes in altitude.
If a barometer reads 30.1 in.Hg at one elevation,what has been the
change in altitude in meters when the barometer reading is 28.3 in.Hg?
thanks
give me some details

优质解答

about 17.60 meters 1.8*9.8=17.64