Parallel side of a trapezium are 21 cm and 14 cm and its area is 875 cm². What us the distance between parallel sides ?

50 cm

We know that,

Area of trapezium = \(\frac{1}{2}\) × (sum of parallel sides) × (distance between parallel sides)

we have,

Sides  = 21 cm, 14 cm

Area = 875 cm²

875 = \(\frac{1}{2}\) × (21 + 14) × distance 

875 × 2 = 35 × distance

Distance = 25 × 2 = 50 cm