Q. Cooking some thing on a hill take long time than in the plain because

1. on the hill atmospheric pressure is low so water boils at lower temperature so it takes long time to cook
2. humid air on the hill takes away the heat so it takes long time to cook
3. due to the atmospheric pressure on the hill boiling point of water rises and takes long time to cook
4. on the hill atmospheric temperature is low so lot of heat goes to the atmosphere so it takes long time to cook