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The area of the trapezium is 540cmsquare. if the ratio of parallel side is 7 : 5 and distance between them is 18, find the length of the parallel side




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Let the length of sides be 7x and 5x
now, area = (1/2)×(sum of parallel sides)×(distance between them)
⇒540 =(1/2)×(7x +5x)×18
⇒540= 12x×9
⇒12x = 60
⇒x =5
So length of sides are 35 cm and 25 cm
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