Question

The perimeter of a rectangle is 60 cm. If its length is 20 cm, find its breadth. A. 5 cm B. 10 cm C. 15 cm D. 20 cm

Answer 1

Breadth = 10 cm

Explanation:

The formula for the perimeter of a rectangle is given by:

P = 2L + 2B, where

• P is the perimeter,
• l is the length,
• and b is the breadth.

Thus, we can find the breadth of rectangle whose perimeter is 60 cm and whose length is 20 cm by substituting 60 for P and 20 for L in the rectangle perimeter formula:

60 = 2(20) + 2B

(60 = 40 + 2B) - 40

(20 = 2B) / 2

10 = B

Thus, the rectangle's breadth is 10 cm.

Answer 2

B

Explanation:

the perimeter (P ) of a rectangle is calculated as

P = 2(length + breadth )

given P = 60 and length = 20

substitute these values into the formula for P

60 = 2(20 + breadth) ← divide both sides by 2 )

30 = 20 + breadth ( subtract 20 from both sides )

10 = breadth