Question

X
The length of a rectangle is twice its breadth: What is its length if perimeter is 90 cm?​

Answer 1

Answer:

let breadth be x

and let the length be 2x

perimeter of rectangle=2(l+b)

90cm =2(2x +x)

2(2x+x) =90cm

2×3x=90

6x=90

x=90÷6=15

so, b=x=15

and l=2x=2×15=30

so, lenght=30cm