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15.The perimeter of a rectangle is 13 cm and its width is 2 3/4 cm. find its length.Perimeter aadec= 13cm.ga rectangle​

Answer»

ANSWER:

As we know,perimeter of rectangle=2× (l+b)

THEREFORE, 2×(2 3/4+b)

Now again as we know, perimeter=13cm

Therefore,2 (2 3/4+b)=13

2(11/4+b)=13

11/4+b=13/2

b=13/2-11/4

b=13×2/2×2-11/4

b=26/4-11/4

b=15/4cm


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