Question

perimeter of a rectangular field is 72 cm. if the length is 20 cm find its breadth​

Answer 1

Answer:

320

Step-by-step explanation:

perimeter=72

ome side is 20

so other is

perimeter =2(l+b)

70=2 (20+b)

b=16 cm

area=l×b

=20×16=320cm sq

Answer 2

A N S W E R :

• Breadth of rectangle is 16 cm.

G I V E N :

• Perimeter of rectangular field = 72 cm Length of rectangular field = 20 cm

T O F I N D :

• Breadth of rectangular field = ?

S O L U T I O N :

Let Breadth of rectangle be 'b'

According to Question now :

→ Perimeter of rectangle = 2(Length + Breadth)

• Perimeter = 72 cm
• Length = 20 cm

Plug in the given values in above formula :

→ 72 cm = 2(20 + b)

→ 72 = 40 + 2b

→ 72 - 40 = 2b

→ 32 = 2b

→ b = 32 ÷ 2

→ b = 16 cm

Therefore, breadth of rectangular field is 16 cm.

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V E R I F I C A T I O N :

➻ 72 = 2(20 + b)

➻ 72 = 2(20 + 16)

➻ 72 = 40 + 32

➻ 72 = 72

H E N C E V E R I F I E D