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w H UL I Le number2. The perimeter of a rectangle is 56 cm. The ratioof length and its breadth is 4:3. Find the lengthand breadth of the rectangle. |
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Answer» Perimeter = 2(l + b)2(l + b) = 56l + b = 28l = 28 - bl/b = 4/3(28 - b)/b = 4/3 3(28 - b) = 4b 84 - 3b = 4b 7b = 84 b = 84/7 = 12 cml = 28 - 12 = 16 cm Let length of Reactangle = 4xLet breadth of Reactangle = 3x Given, Perimeter of Reactangle = 56 cm Then,Perimeter of Reactangle= 2(length + breadth) 2(4x + 3x) = 567x = 28x = 28/7 = 4 Therefore,Length = 4*4 = 16 cmBreadth = 3*4 = 12 cm |
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