Question

the perimeter of a rectangle is 100 cm . if it's length is 30 cm , what is the breath ?​

Answer 1

Answer:

20

Step-by-step explanation:

B OF REC= P/2-L

= 100/2-30

= 50-30

= 20

Answer 2

Step-by-step explanation:

Solution :-

Given that

Length of a rectangle (l) = 30 cm

Let the breadth be b cm

We know that

Perimeter of a rectangle = 2(l+b) units

Perimeter of the given rectangle

=> P = 2(30+b) cm

According to the given problem

Perimeter of the rectangle = 100 cm

=> 2(30+b) = 100

=> 30+b = 100/2

=> 30+b = 50

=> b = 50-30

=> b = 20 cm

Therefore, breadth = 20 cm

Answer:-

The breadth of the given rectangle is 20 cm

Check :-

Length = 30 cm

Breadth = 20 cm

Perimeter = 2(30+20) cm

=> P = 2(50) cm

=> P = 100 cm

Verified the given relations in the given problem.

Used formulae:-

→ Perimeter of a rectangle = 2(l+b) units

• l = length
• b = breadth