Question

10) The perimeter of a rectangle is 13 cm and its width is 2 3 4 cm. Find its length

Answer 1

The perimeter of a rectangle is 13 cm and its breadth is 2 3/4cm

let lenght be l

now  

=> 11/4 cm

perimeter of rectangle = 2(l+b)

so ,

13 =  2(l+b)

13 =  2(l+11/4)

13 = 2l +11/2

13 - 11/2 = 2l

26-11/2 = 2l

15/2 = 2l

=>l= 15/2*2

=>l = 15/4cm 

Hope this will help you.

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