Question

if the cloth of a person catch fire he is wrapped his blanket to extinguish fire why

Answer 1

Because the fire needed oxygen, when we wrapped the person whose cloth catches fire the fire in blanket the fire didnot get oxygen and the fire extinguishes

Answer 2

The first thing to note is that flame and smoke rise so on a person stood upright the obvious will happen. The advice is to hit the ground and roll. This will smother the flames and extinguish the fire. If there is a coat or blanket immediately to hand this will help by providing a further cover over the flames. It is the action of smothering the flames that reduces the ability for oxygen to reach the fire.