The distance between two parallel sides of a trapezium is 15 m and its area is 480 m². If one of the parallel sides is 20 m long, then length of the other side is:

44 m

Area of trapezium = \(\frac{1}{2}\) × ( Sum of both parallel sides ) × Height

480 = \(\frac{1}{2}\) × ( 20 + a ) × 15

960 = ( 20 + a ) × 15

64 = 20 + a

a = 44

The correct answer is Option (2) → 44 m