Charla wants to cover a certain rectangular area of her driveway with a picture using chalk. If she completes 2/3 of the area in 1/2 hour, how long will it take her to complete the entire picture?

Answer 1

Since Charla completes 2/3 of the area in 1/2 hour, this means that she completes 1/3 of the area in 1/2 hour, which can be written as 1/3 * 1/2 = 1/6 of the area in 1/2 hour.
Therefore, it will take Charla 6 * 1/2 = <<6*1/2=3>>3 hours to complete the entire picture. Answer: \boxed{3}.

Answer 2

3/4 of an hour