we know that perimeter of a rectangle=2*[base+height] base=3y+1 height=2y+3 perimeter=90 units so 90=2*[(3y+1)+(2y+3)]-----> 90=2*[5y+4]----> 10y+8=90----> y=8.2 units
base=3y+1-----> base=3*8.2+1-----> 25.6 units height=2y+3----> height= 2*8.2+3---> 19.4 units
the answer is the length of side vy is (2y+3)-----> 19.4 units
