soal matematika kelas 5

Mapel MM
Bab Bangun Ruang
trapesium 1:A
trapesium 2:B

A:(a+b)×t/2
:(20+15)×6/2
:35×6/2
:105 Cm^2
B:(a+b)×t/2
:(18+20)×5/2
:38×5/2
:95 cm^2
Luas A + Luas B :105+95
:200