Balok berukuran p=24 l=20 t=15 hitung luas permukaan

2*(24*20)+(24*15)+(20*15)=
2*(480+360+300)=
2*1140=2280 cm^

* : kali
^ : kuadrat

L. permukaan = 2 (pl+pt+lt)
L = 2 (24x20+24x15+20x15
= 2 (480+360+300
= 2 x 1140
= 2280