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Answer:
perimeter of trapezium=134cm
let the trapezium be ABCD in which AB and CD are parallel sides and AD and BC are non parallel sides.
then AB=54cm and CD=30cm
AD=BC
perimeter of trapezium=134cm
AB+BC+CD+AD=134
AD+AD+54+30=134
2AD=50
AD=25cm
Hence non parallel sides which are of equal length =25cm
Explanation: