Nomer 4 saya butuh bantuan

P : 7 2/3
l : 6 3/4
K = 2(p+l)
= 2 (7 2/3 + 6 3/4)
= 2 ( 23/3 + 27/4)
= 2 (92/12 + 81/12)
= 2 (173/12)
= 173/6
= 28,83
L = p x l
= 7 2/3 × 6 3/4
= 23/3 × 27 / 4
= 621/12
= 51,75