Mohammed is currently 2*30 = <<2*30=60>>60 years old.
four years ago, Mohammed was 60-4 = <<60-4=56>>56 years old
Four years ago, Kody was half Mohammed's age, which is 56/2 = <<56/2=28>>28 years old.
Currently, Kody is 28+4 = <<28+4=32>>32 years old
#### 32