Question

perimeter of a rectangle is 13 cm and its width is 10cm find its length

Answer 1

perimeter =2(l+w)=13
here width =10
by solving this we can get l is in negative form so the given data is not appropriate

Answer 2

let the length be x cm
width= 10cm
Then, perimeter is = 2(x+10)
= 2x+20
But, perimeter is = 13 cm

Therefore, 2x+20= 13
2x= 13-20
2x= -7
x= -7/2
x= -3.5

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