A rectangle is twice as long as it is tall. Its height is 5 centimeters what is its area in square centimeters
The length of the rectangle is twice its height, which is 5 centimeters. This means the length is 2 * 5 = <<2*5=10>>10 centimeters.
The area of a rectangle is calculated by multiplying its length by its width, so in this case, the area is 10 * 5 = <<10*5=50>>50 square centimeters. Answer: \boxed{50}.