Mathematics · Quantity Comparison

Determine the relationship between the three given quantities: Quantity I: Find the difference (in cm) between the parallel sides of a trapezium whose area is 336 cm2. The height of the trapezium is (9.5k + 4.75) cm, and the radius of a sphere is 25% of (38k + 19) cm. The surface area of the sphere is 5544 cm2, and the ratio of the parallel sides of the trapezium is 9:7. Quantity II: A vessel contains 40 liters of a mixture of water and acid in the ratio of 3:2. If 20 liters of the mixture is taken out and replaced by water, what is the numerical value of the percentage of acid in the final mixture? Quantity III: The average age of a family of 6 members is 35 years. When one member whose age is 35 years leaves the family and another new member joins whose age is (2x + 1) years, the average age of the family decreases by 3 years. Find the value of x.