bantu jawab...............

perbandingan
VU/SR = VP/SP = PT/PQ = UT/RQ

 VP/SP = VU/SR
8/(4+8) = 6/SR
    8/12 = 6/SR
      SR = (6x12)/8
      SR = 9 cm

 VP/SP = PT/PQ
8/(4+8) = 20/PQ
    8/12 = 20/PQ
      PQ = (20x12)/8
      PQ = 30 cm

Luas trapesium PQRS
= (a+b)/2 x t
= (SR+PQ)/2 x (SV+VP)
= (9+30)/2 x (4+8)
= 39/2 x 12
= 234 cm^2