Question

The length of a rectangle is 10 cm and its perimeter is 30 cm find its breadth.​

Answer 1

Answer:

Hence the breadth or other side of rectangle = 5cm.

Answer 2

$\frak{Given}\begin{cases}\sf{\;\;\; Length\; of \; rectangle = \bf{10\;cm}}\\\sf{\;\;\;Perimeter\:of\; rectangle = \bf{30\;cm}}\end{cases}$

Need to find:

Breadth of the rectangle.

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$\underline{\bf{\dag} \:\mathfrak{As\;we\;know\: that\: :}}$

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$\bigstar\;\boxed{\sf{\pink{Perimeter_{\:(rectangle)} = 2(l + b)}}}$

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Here, l is length of the rectangle and b is breadth of the rectangle.

Here, l is length of the rectangle and b is breadth of the rectangle.⠀

Therefore,

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$:\implies\sf 2(10 + b) = 30 \\\\\\:\implies\sf 20 + 2b = 30\\\\\\:\implies\sf 2b = 30 - 20 \\\\\\:\implies\sf 2b = 10 \\\\\\:\implies\sf b = \cancel\dfrac{10}{2} \\\\\\:\implies{\underline{\boxed{\frak{\pink{b = 5\; cm}}}}}\;\bigstar$

$\therefore{\underline{\sf{Hence,\; breadth\; of \; the \: rectangle\; is\; \bf{ 5\;cm}.}}}$

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