Question

the perimeter of a rectangle is 200cm.Its length is three times of its breadth. find its length and breadth​

Answer 1

perimeter =200cm

let breadth of rectangle =x cm

so,length=3x

perimeter =2(l+b)

200=2(x+3x)

200/2=4x

100=4x

100/4=x

x=25

b=25 cm

l=3×25=75cm

Answer 2

Answer:

b=20cm

l=80cm

Step-by-step explanation:

perimeter = 200cm.

b=x

l=3x+x

2(l+b)=200

2(3x+x+x)=200

2(5x)=200

10x=200

x=200/10=20

now,

b=20

l=3(20)+20=80