Class 7 Mathematics

Chapter 11: Perimeter and Area

NCERT Textbook Questions & Answers

Question 1

Find the perimeter of a rectangle whose length is 10 cm and breadth is 6 cm.

Answer:

Step 1: Write the formula for perimeter of a rectangle.

Perimeter = 2 × (Length + Breadth)

Step 2: Substitute the given values.

Perimeter = 2 × (10 + 6)

Step 3: Simplify.

Perimeter = 2 × 16 = 32 cm

✅ Final Answer: Perimeter = 32 cm

Question 2

Find the perimeter of a square whose side is 9 cm.

Answer:

Step 1: Write the formula for perimeter of a square.

Perimeter = 4 × side

Step 2: Substitute the value.

Perimeter = 4 × 9

Step 3: Calculate.

Perimeter = 36 cm

✅ Final Answer: Perimeter = 36 cm

Question 3

Find the area of a rectangle whose length is 12 cm and breadth is 5 cm.

Answer:

Step 1: Write the formula for area of a rectangle.

Area = Length × Breadth

Step 2: Substitute the given values.

Area = 12 × 5

Step 3: Calculate.

Area = 60 cm²

✅ Final Answer: Area = 60 cm²

Question 4

Find the area of a square whose side is 14 cm.

Answer:

Step 1: Write the formula for area of a square.

Area = side × side

Step 2: Substitute the value.

Area = 14 × 14

Step 3: Calculate.

Area = 196 cm²

✅ Final Answer: Area = 196 cm²

Question 5

What is the difference between perimeter and area?

Answer:

• Perimeter is the distance around a closed figure.
• Area is the space enclosed inside a closed figure.

✅ Final Answer: Perimeter measures boundary, area measures surface.

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Shaktimatha CBSE Learning
Class 7 Mathematics – Chapter 11
NCERT Textbook Questions & Answers

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