Question

question number 4
class 7 NCERT book

Answer 1

Answer:

Step-by-step

Length=35

Perimeter=100cm

2(length + breadth)=100

Length + breadth = 100/2

Length + breadth = 50

35 + breadth =50

Breadth=50-35

Breadth=15cm

Area= length x breadth

Area=35 x 15

Area=525cm^2

Hope this helps.

Answer 2

Hey there!

Answer:

Breadth = 15 cm

Area = 525 cm²

Step-by-step explanation:

4. Given,

Length = 35 cm    ,   Perimeter = 100 cm

Let the breadth be b cm.

Perimeter = 2 (length + breadth)

100 = 2 (35 + b)

100 / 2 = 35 + b

50 = 35 + b

50 - 35 = b

or, 15 = b

or, b = 15 cm

Area = Length * Breadth

Area = 35 * 15

Area = 525 cm²

Hope It Helps You!