Charla wants to cover a certain rectangle area of her driveway with a pitcher 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
If Charla completes 2/3 of the area in 1/2 hour, then she completes 1/3 of the area in 1/2 hour (since 1 - 2/3 = 1/3).
To complete the remaining 1/3 of the area, it will take her the same amount of time as it took her to complete 2/3 of the area: 1/2 hour.
So, it will take Charla a total of 1/2 hour + 1/2 hour = <<1/2+1/2=1>>1 hour to complete the entire picture. Answer: \boxed{1}.