The area of a trapezium is 91 cm2 and its height is 7 cm. If one of the parallel sides is longer than the other by 8 cm, find the two parallel sides.
Let the length of one parallel side of trapezium = 
Length of other parallel side of trapezium = 
Area of trapezium = 91 cm2
Area of trapezium = 
91 = 
Therefore length of one parallel side of trapezium = 9 cm
Length of other parallel side of trapezium = 9+8 = 17 cm
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