Question 906678
wt= mL dn=100 sn1= sn2=%
a+b=240,
0.3*a+0.7*b=0.45*240
a=240-b
0.3*(240-b)+0.7*b=108
72-0.3b+0.7*b=108
0.4*b=36
b=90
a=240-b
a=150  mL at 30%
b=90  mL at 70%
check
0.3*150+0.7*90=0.45*240
45+63=108
108=108
ok