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(pp-ld)+(p-ld)
=((12×5)-20)+((10×10)-20)
=(60-20)+(100-20)
=40+80
=120
ket
pp=persegi panjang
p=persegi
ld=luas diarsir
maaf soal yg lain burem jdi susah di bacanya
semoga bermanfaat:)