The ratio of the length of the parallel sides of a trapezium is 4:1. The distance between them is 10 cm. If the area of the trapezium is 500 sq cm, find the length of the parallel sides.
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Answer:Let the sides be x and 4x
Area of a trapezium = 1/2( sum of parallel sides) x height
500 = 1/2 ( 5x) X 10
100 = 5x
x = 20 cm
Hence one side is 20 cm and the other side is 4(20) = 80 cm
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