Question

If length of a rectangle is 40 cm and its perimeter is 120 cm;find its breadth and area. [2]

Answer 1

Answer:

the breadth is=20 and area=800

Answer 2

Answer:

$\huge\bf\purple{Question}$

If length of a rectangle is 40 cm and its perimeter is 120 cm;find its breadth and area.

$\huge\bf\red{Answer}$

• length = 40 cm

• perimeter = 120 cm

• breadth = ?

• area = ?

Perimeter of rectangle = 2×(l+b)

➡️ 120 = 2×(40+b)

➡️ 120 = 80 + 2b

➡️ 120 - 80 = 2b

➡️ 40 = 2b

➡️ b = 40/2

➡️ b = 20

Therefore , breadth is 20 cm.

Area of rectangle = length × breadth.

➡️ 40 × 20

➡️ 800 cm²

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