Question

Q.16 The length of rectangle is thrice its breadth and its perimeter is 48cm.
Find length and breadth of rectangle.​

Answer 1

Given

The length is rectangle is thrice its breadth ; l=3b

Perimeter is 48cm

Now let

Length of rectangle is l

Breadth of rectangle is b

Formula

Perimeter of rectangle = 2(l+b)

Where l = 3b

48cm = 2(3b+b)

48cm = 2(4b)

48cm = 8b

b = 48/8

b = 6

So we get

Length of rectangle is l = 3b ; 3(6) = 18cm

Breadth of rectangle is b = 6cm

Answer

Length = 18cm

Breadth = 6cm

Answer 2

Answer:

Length - 18cm

Breadth - 6cm

Step-by-step explanation:

Let the breadth be x

So, the length will be 3x

Formula for perimeter - 2 ( l + b )

So,

2 ( 3x + x )

Now, lets form the linear equation

2 (3x + x) = 48

3x + x = 48÷2

3x + x = 24

4x = 24

x = 24 ÷ 4

x = 6

So, length is = 6 x 3 = 18

Hope it helps