Each page of a photo album holds three rows of four square photos. the area of each photo is 25 cm². there is 2 cm space between photos and a 3 cm border around the group of pictures. what are the dimensions of one page of the photo album?

32 cm wide by 25 cm tall. Since each photo is square and has an area of 25 cm², that means that the length of each edge of the photos is 5 cm. So the length of a page (2 border gaps + 4 photos + 3 spacing gaps) is 2*3 + 4*5 + 3*2 = 32 cm The height of a page (2 border gaps + 3 photos + 2 spacing gaps) is 2*3 + 3*5 + 2*2 = 25 cm So the page size is 32 cm x 25 cm