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CBSE Class 6 Answered

The length of a rectangular field is 20 m more than its breadth. If the perimeter of the field is 280 m , what is its length?
Asked by ameetjain75 | 12 Feb, 2017, 06:17: PM
answered-by-expert Expert Answer
begin mathsize 16px style Let space the space breadth space of space the space rectangle space be space apostrophe straight x apostrophe space straight m. So comma space the space length space of space the space rectangle space is space left parenthesis straight x plus 20 right parenthesis space straight m. Since space the space perimeter space of space the space rectangle space equals space 2 left parenthesis length plus breadth right parenthesis rightwards double arrow 280 equals 2 left parenthesis straight x plus 20 space plus thin space straight x right parenthesis rightwards double arrow 280 equals 2 left parenthesis 2 straight x plus 20 right parenthesis rightwards double arrow 280 equals 4 straight x plus 40 rightwards double arrow 4 straight x equals 240 rightwards double arrow straight x equals 60 So comma space the space length equals straight x plus 20 equals 60 plus 20 equals 80 space straight m end style
Answered by Rebecca Fernandes | 12 Feb, 2017, 07:07: PM

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