Question

length of a rectangle is twice its breadth . If perimeter is 60cm , find its length and breadth​

Answer 1

Given,

Length = 2(breadth)

=> l = 2b. => { 1 }

perimeter = 2(l+b)

60=2(2b+b) [since, l=2b]

30=3b

b=10

Sub in { 1 }

l = 2b

=> l = 20

Therefore,length of rectangle = 20cm

breadth of rectangle =10cm

Answer 2

Step-by-step explanation:

let breadth=x

then,length=2x

perimeter=60cm

2(l+b)=60

2(2x+x)=60

4x+2x=60

6x=60

x=10

2x=20

length=20

breadth=10