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The perimeter of a rectangle is 200 meters. The breadth is 3/7 part of the length. What is the length?

The perimeter of a rectangle is 200 meters. The breadth is 3/7 part of the length. What is the length? Correct Answer 70m

Let,length is 7x m and breadth is 3x m.ATQ, 2(7x+3x) = 200⇒ 10x = 100⇒ x = 10So, the length is 7×10 = 70 

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