the other parallel side is 30 cm
Step-by-step explanation:
here's the solution :-
let the other parallel side be x
now,
=》Area of trapezium =
=》( x + 20 ) × 8 = 400
=》x + 20 = 400 ÷ 8
=》x = 50 - 20
=》x = 30
so length of other parallel side = x = 30 cm