OG详解-OG3 数学1 Q10

Choice D is correct. The perimeter,  P , of a square can be found using the formula P = 4s, where s  is the length of each side of the square. It’s given that square X    has aside length of  12  centimeters. Substituting  12  for s  in the formula for the  perimeter of a square yields P = 4 (12), or P = 48. Therefore, the perimeter of square X is 48 centimeters. It’s also given that the perimeter of square Y is  2 times the perimeter of square X. Therefore, the perimeter of square Y is  2 (48), or 96, centimeters. Substituting 96 for P in the formula  P = 4s gives 96 = 4s. Dividing both sides of this equation by 4 gives  24 = s. Therefore, the length of one side of square Y is  24 centimeters.
Choice A is incorrect and may result from conceptual or calculation errors.
Choice B is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect and may result from conceptual or calculation errors.