1) CPT= CV + VR
6000= 4500 + VR
VR = 600-4500 = 1500 ml
DR= VC x FR
DR= 500 x 18 = 9000ml => 9 l
2) DR= VC x FR
DR= 500 x 20 = 10.000ml => 10 l
CV= 50/100 x 10.000 = 5000ml
CV= VIR+VER+VC
5000=2500+VER+500
5000=3000+VER
VER=5000-3000=2000ml
CPT=CV+VR
CPT= 5000+1500= 6500ml
3) CV=VIR+VER+VC
5000=2500+VER+500
VER=2000ml
VR=50/100 x 2000= 1000ml
CPT=CV+VR
CPT=5000+1000= 6000ml
4) VR=3x600=1800ml
CV=VIR+VER+VC
CV=2000+2000+600
CV=4600ml
CPT=CV+VR
CPT=4600+1800=6400ml
DR=VCxFR
DR=600x20
DR=12.000ml => 12 l