Question

the length of a rectangle is 1cm more than two times it's breadth. it's perimeter is 80cm
.what is its length

Answer 1

length=2b +1

perimeter of rectangle
=2(l+b)
=2(2b +1+b)
80=2(3b+1)
40=3b+1
39=3b
13=b

length=13*2+1
=26+1=27 cm

hope it helps