Correct Answer:
Option A - Hypsometer– It is used to determine the altitude of the station depending on the temperature as boils varies with the atmospheric pressure. Therefore the method of levelling is used to estimate the height of the mountain by observing the temperature at which water boil.
A. Hypsometer– It is used to determine the altitude of the station depending on the temperature as boils varies with the atmospheric pressure. Therefore the method of levelling is used to estimate the height of the mountain by observing the temperature at which water boil.