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If the perimeter of a rectangle with dimension (2x+10) and (x+20) is 240 cm. find its dimensions |
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Answer» perimeter=2(l+b) 240= 2(2x+10+x+20) 120=3x+30 3x=90 x=30. ⇒ l=2x+10=70cm b=x+20=50cm |
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