Find the perimeter of a rectangular field whose length is four times its breadth and which has an area equal to 30,976 sq cm.

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Solution

Let b be the breadth. Then length = 4b.
$∴ 4 b \times b = 30, 976,$
$b^{2} = 7744$
b = 88 cm.

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Find the perimeter of a rectangular field whose length is four times its breadth and which has an area equal to 30,976 sq cm.

Let b be the breadth. Then length = 4b. ∴4b×b=30,976, b2=7744 b = 88 cm.

Let b be the breadth. Then length = 4b.
$∴ 4 b \times b = 30, 976,$
$b^{2} = 7744$
b = 88 cm.