You paint 1/2 wall in 1/4 hour at rate how long will it take you you to paint one wall

It will take you 1/2 hour to paint 1 wall or 30 minutes.

You are given the rate at which it takes for you to paint half of a wall, and painting a whole wall is the same as painting half the wall twice. Using this knowledge all you must do is multiply the original rate times 2 and get the amount of time being 1/2 an hour to paint the whole wall