On a certain day, orangeade was made by mixing a certain : Problem Solving (PS) - Page 2

Lets assume the amount of orange and water added on first day = 50ml
So on day 1 = 100mL*0.6 = 60
On day 2 = 50mL + 100mL = 150mL

Since revenue is same on both days => 100*0.6 = x*150 => x = 0.4 = D