Question

The length of a rectangle is thriceits breadth. If its perimeter is 60 cm, find the length and the breadth of the rectangle.

Answer 1

Step-by-step explanation:

• Let, Breadth = x
• So, length = 3x
• And, Perimeter of rectangle => 2(l+b) => 60 = 2(x+3x) => 60 = 2*4x => 60 = 8x => x =60/8 => x= 7.5 cm
• Therefore, Breadth = 7.5 cm & Length = 3x = 3*7.5 = 22.5 cm

Answer 2

Answer :

• Breadth = 7.5cm
• Length = 22.5 cm

Given :

• The length of a rectangle is thrice its breadth
• Perimeter is 60cm

To find :

• The length and the breadth of the rectangle

Solution :

• Let the breadth be x
• Let the length be 3x

As we know that,

• Perimeter of rectangle = 2(l + b)

》60 = 2(3x + x)

》3x + x = 60/2

》3x + x = 30

》4x = 30

》x = 30/4

》x = 7.5cm

Hence,

• Breadth = x = 7.5cm
• Length = 3x = 3(7.5) = 22.5cm

Verification :

As we know that,

• Perimeter of rectangle = 2(l + b)

》Perimeter of rectangle = 2(l + b)

》2(7.5 + 22.5)

》2(30)

》60cm