Question

The perimeter of a rectangle is 13 cm and its width is to 2 3 by 4 cm find its length

Answer 1

$given \: \: perimeter = 13 \\ width = \frac{23}{4} \\ \\ so \\ \: \: \: perimeter = 2(l + b) \\ 13 = 2(l + \frac{23}{4} ) \\or \: 2(l + \frac{23}{4} ) = 13 \\ \\ 2l + \frac{23}{2} = 13 \\ 2l = 13 - \frac{23}{2} \\ 2l = \frac{26 - 23}{2} \\ 2l = \frac{3}{2} \\ l = \frac{3}{2 \times 2} \\ l = \frac{3}{4}$










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