Question

Each side of a square flower bed is 2m 80cm long. it is extended by digging a strip 30 cm wide all around it. find the area of the enlarged flower bed and also the increase in the area of the flower bed

Answer 1

Answer:

The area of new bed is 115600 cm². The change in area is 37200 cm².

Step-by-step explanation:

The area of a square is

$A=a^2$

where, a is side length.

It is given that the bed is 2m 80cm long.

$2m80cm=2\times 100+80=280cm$

The area of bed is

$A_1=(280)^2=78400$

It is extended by digging a strip 30 cm wide all around it.

The new side length is

$280+2(30)=340$

The area of new bed is

$A_2=(340)^2=115600$

The area of new bed is 115600 cm².

Change in area is

$115600-78400=37200$

Therefore the change in area is 37200 cm².

Answer 2

Step-by-step explanation:

ईच ऑफ़ ए फायर फ्लावर दैट इज 2 मीटर 8 सेंटीमीटर लॉन्ग इट इज एक्सटेंड बाय गिविंग ए स्ट्रिप 30 सेंटीमीटर वाइट ऑल अराउंड इट्स फाइंड द एरिया ऑफ द इन लास्ट फ्लावर बेड एंड आल्सो द इनक्रीस इन द एरिया ऑफ द फ्लावर बेड