The length of parallel sides of a trapezium are in ratio 3 : 5 and the distance between them 10 cm if the area of trapezium is 120 ×120cm
find the length of its parallel sides
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let the parallel sides be 3x and 5x
area of trapezium = 1/2 × 10 × (5x+3x) = 11400
2280 = 8x
x = 2280/8
x = 285
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