tolong ya... jawabpinn...

p = 8 + l

Keliling = 2 × (p + l)
124 = 2 × (8 + l + l)
124/2 = 8 + 2l
62 = 8 + 2l
62 - 8 = 2l
54 = 2l
54/2 = l
27 cm = l

p = 8 + l
p = 8 + 27
p = 35 cm

Luas = p × l
Luas = 35 × 27
Luas = 945 cm2