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panjang = 3/5 × 60 cm = 36 cm
lebar = 2/5 × 60 cm = 24 cm
luas = 24 cm × 36 cm = 864 cm ²
120 = 2( 3x+2x )
120 = 6x + 4x
120 = 10x
x = 120/10=12
luas = pxl
= 3(12) x 2(12)
= 36 x 24 = 864cm²