Correct Answer - Option 4 : Both the statements I and II together are sufficient.
Given,
Capacity of a solution tank A is 70% of the capacity of tank B.
From statement 1: Tank A is 80% full and tank B is 40% full.
Alone with statement 1, we can’t find the gallons of solution in tank A and tank B.
From statement 2: Tank A if full contains 14,000 gallons of solution.
Alone with statement 2, we can't find the gallons of solution in tank A and tank B
Now, combining statement 1 and 2.
Gallons of solution in tank A = 80% of 14000 = 11200 gallons
We know that Solution in tank A is 70% of the capacity of tank B.
∴ Capacity of tank B = 14000/0.7 = 20000 gallons
Gallons of solution in tank B = 40% of 20000 = 8000 gallons
∴ Both the statements I and II together are sufficient.