Question

The length of a rectangle is thrice its breadth. If its perimeter is 80 cm, find the
length and the breadth of the rectangle​

Answer 1

Step-by-step explanation:

Let the breadth be X

Let the length be 3x

Now,

Perimieter = 2(L+B)

80 = 2(3x + x)

80 = 6x + 2x

80 = 8x

x = 80

8

x = 10 cm

Breadth = 10cm

Length = 3x

= 3x10

= 30 cm

Answer 2

Answer:

length=30

breadth=10

Step-by-step explanation:

Let the breadth of a rectangle be x

then, it's length be 3x

A/q

Perimeter of rectangle=2(l+b)

80=2(3x+x)

80=2×4x

8x=80

x=80/8

x=10

Length =3x=3×10=30

breadth =x=10