If the breadth and perimeter of a rectangle are $12 c m$ and $50 c m$ respectively, then its length will be

13cm

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15cm

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20cm

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Solution

The correct option is A 13cm
Perimeter of a rectangle $= 2 (length + breadth)$
$\Rightarrow 50 = 2 (length + 12)$
$\Rightarrow (length + 12) = 25 c m$
$\Rightarrow length = 25 - 12 = 13 c m$
Hence length of the rectangle $= 13 c m$ .

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