How long does it take for a king cobras venom to kill a human?

The venom of a king cobra can be lethal to humans, with death potentially occurring within 30 minutes to a few hours after envenomation, depending on various factors such as the amount of venom injected and the individual's health. Prompt medical treatment, including antivenom, can significantly improve survival chances. However, it's important to note that fatalities are rare due to advances in medical care.