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2015-11-07T21:13:23+05:30

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given,
length = 5x

breadth = 3x
perimeter = 64 cm
therefore ,
perimeter = 2 ( l + b )
64 = 2 ( 5x + 3x )
64 = 2 ( 8x )
64 = 16x
64 /16 = x
4 = x
therefore,
value of length = 5x = 5 * 4 = 20 cm

value of breadth = 3x = 3 * 4 = 12 cm
      
i hope that my answer will help u..........................^_^
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2015-11-07T21:20:22+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the length and breadth in the ratios be 5x  and 3 x.

We know that ,
Perimeter of rectangle = 2 × ( length + breadth )
⇒ 64 = 2 × ( 5x + 3x )
⇒64  = 2 × ( 8 x )
⇒ 64 = 16 x
⇒ 4 = x 

Therefore ,

length ⇒ 5 × x
         ⇒ 5 × 4
         ⇒ 20 cm.

and ,
breadth ⇒ 3 × x
            ⇒ 3 × 4
            ⇒ 12 cm.

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