Question

the length is twice its breadth find the length if the perimeter is 90 cm

Answer 1

Answer: 30cm

Step-by-step explanation:

Let the breadth be x.

So length is 2x.

Perimeter=2(l+b)

90=2(x+2x)

90=6x

x=90/6=15

Breadth is15cm

Length is 2×15=30cm

Answer 2

Breadth=x
then length=2x
Perimeter of rectangle =2(l+b)
90=2(2x+x)
90=6x
x=90/6=15
Length=2x=2*15=30
Breadth =x=15