The area of a trapezium is `475` `cm^(2)` and the height is `19 cm`. Find the lengths of its two parallel sides, if one side is `4 cm` greater than the other.

Explanation

To solve the problem step by step, we will use the formula for the area of a trapezium and the given information about the trapezium.

### Step 1: Understand the problem
We are given:
- Area of the trapezium = 475 cm²
- Height of the trapezium = 19 cm
- One parallel side is 4 cm greater than the other.

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