The segment AB of point C is 5:3, and the segment AB of point D is 3:5. Given DC = 10cm, find the length of ab

The segment AB of point C is 5:3, and the segment AB of point D is 3:5. Given DC = 10cm, find the length of ab

dc=ac-ad=5/8ab-3/8ab=ab/4
ab=4dc=4*10=40cm