A 5100sq.cm trapezium has the perpendicular distance between the two parallel sides 60cm if one of the parallel sides be 40cm then the lenght of the other parallel side is
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ar of trap=1/2(side1+ side 2)*h
1/2(x+40)*60=5100
x+40=5100*2/60
x=170-40=130
1/2(x+40)*60=5100
x+40=5100*2/60
x=170-40=130
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