Question 281844
Let 80% acid required be x

30% acid will be 200 -x

80%-----------------------30%---------------------62%

x-------------------------200-x-------------------200   quantity

0.8x+0.3(200-x)=0.62*200

0.8x+60-0.3x=124

0.5x=124-60

0.5x=64

x=64/0.5

=128 liters  ---- 80% acid

The balance will be 30 % acid solution=72 liters