The area of a trapezium is `91\ c m^2` and its height is 7cm. If one of the parallel sides is longer than the other by 8cm, find the two parallel sides.

Explanation

To solve the problem, we need to find the lengths of the two parallel sides of a trapezium, given its area, height, and the difference in lengths of the parallel sides.

### Step-by-Step Solution:

1. **Understand the given information**:
- Area of the trapezium (A) = 91 cm²
- Height (h) = 7 cm
- Let the lengths of the two parallel sides be \( a \) (the shorter side) and \( b \) (the longer side).
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