Explanation: This is a question about finding the surface area: First, the perimeter of the bottom = (length and width) * 2 = 60, so (length and width) = 30 (cm)

Surrounded If the peripheral trademark does not include the upper and lower surfaces, then the peripheral area = length * height * 2 width * height * 2 = (length and width) * height * 2 = 30 * 12 * 2 = 720 (square centimeters)

Pay attention to the surrounding area: length*height means a side area, multiplying by 2 means there is a side area with the same area

Specific answer: 60/2=30 (cm) 30*12*2= 720 (square centimeters)

Absolutely correct