gausah tulis caranya. jawabannya aja langsung

2(p+l) = 66
p - l = 10
___________
p+l = 33
p - l = 10
__________ _
2l = 23
l = 23/2

p+l = 33
p = 43/2

Luas
= p × l
= 43/2 × 23/2
= 247,25 cm²