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प्रश्न
If P denotes perimeter of a rectangle, l denotes its length and b denotes its breadth, find:
l, if P = 38cm and b = 7cm
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उत्तर
l, if P = 38cm and b = 7cm
Length, (l) = `"P"/2 - "b"`
`= 38/2 - 7` cm
= 19 cm - 7 cm
= 12 cm
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