ABCD and JKLM are similar rectangles. What is the perimeter of JKLM?21 m22 m24 m28 m

1) 3 / x = 4 / 6
2) 4x = 18
3) x = 4.5
4) 4.5 + 6 + 4.5 + 6 = 21
Answer: 21 m