# Class 5 Maths Area And Its Boundary Extra Questions

IMPORTANT QUESTIONS FOR CBSE EXAMINATION | CLASS 5 MATHEMATICS

AREA AND ITS BOUNDARY – Lesson 11

Fill in the blanks: (1 mark)

1. The perimeter of a square with side 3 cm is —————

2. Area of a rectangle 5 cm long and 3 cm width is ———– sq cm

3. Area of a square is —————

4. The length of the boundary is known as —————

5. The perimeter of a triangle of sides 4 cm, 3 cm and 2 cm is —————-

Answer the following (2 marks):

6. Perimeter of a square is 48 cm. Find the length of its side?

7. The length of a rectangular garden is 20 m and breadth is 13 m. How much barbed wire will be needed to fence the garden?

8. Find the area of a rectangle whose length is 12 cm and breadth is 10 cm.

9. A square garden has a perimeter 40m. What is its area?

10. A rectangular field is 24 m long and 20 m wide. Find the cost of fencing the field at the rate of 25 rupees per metre.

11. The fencing of a square garden is 32 m in length. How long is one side of the garden?

12. A thin wire 40 cm long is formed into a rectangle. If the width of this rectangle is 8 cm, what is its length?

13. Find the perimeter of a triangle with sides measuring 10 cm, 14 cm and 15 cm?

14. Find the side of the square whose perimeter is 20m?

15. The area of a rectangular garden 50 m long is 300 sq m. Find the width of the garden?

**ANSWERS:**

1. 12 cm

2. 15 sq cm

3. Side x side

4. Perimeter

5. 9 cm

6. Perimeter = 48 cm

Length of a side = perimeter/4 = 48/4 =12cm

7. Given l = 20 m, b = 13 m

Perimeter = 2 x (l + b) = 2 x (20 + 13) = 2 x 33 = 66 m

8. Given l=12 cm, b= 10 cm

Area = l x b = 12 x 10 = 120 sq cm

9. Given perimeter = 40 m

Length of a side = perimeter/ 4 = 40 / 4 = 10 m

Area = side x side = 10 x 10 = 100 sq m

10. Given l= 24 m, b = 20 m

Perimeter = 2 x (l + b) = 2 x (24 + 20) = 2 x 44 = 88 m

Cost of fencing = 88 x 25 = 2200 rupees.

11. Given perimeter = 32 m

Length of one side = 32/ 4 = 8m

12. Perimeter =2 x (l + b) = 40 cm and b = 8 cm

l + b = 20

l + 8 = 20

l = 20 – 8 = 12cm

13. Perimeter = 10 + 14 + 15 = 39 cm

14. Length of the side of a square = perimeter / 4 = 20/4 = 5 m

15. Given l = 50 m

Area = 300 sq m

Width = Area/ length = 300/ 50 = 6 m