Question

Why does it take longer to boil water at higher altitudes than lower altitudes?

Answer 1

Less energy means less heat, which means water will boil at a lower temperature at a higher altitude. Some people think that a lower boiling point means that foods will cook more quickly at higher altitudes. However, the opposite is true. If you want to boil an egg, it will take a bit longer at altitude

Answer 2

here is your answer

it it take longer to boil water at higher altitude than lower altitude

because
due to pressure

At higher altitude there are less pressure as compared to lower altitude
that is the reason

hope you understand