Some vegetables are to be cooked in a pressure cooker. At which of the following places will the cooking process take the longest time?

At higher altitudes, the atmospheric pressure decreases. Atmospheric pressure exerts pressure on the molecules of the liquid, confining them. In order to boil, the electrons must be excited, but must become hotter to overcome the pressure of the atmosphere. Therefore, pressure makes a liquid boil at a higher temperature. At Shimla, water actually boils at a faster rate, but it takes longer to cook vegetables. So, it is recommended to add salt in water, which decreases the boiling point of water, to cook the vegetables.