The DAV Maths Book Class 4 Solutions and **DAV Class 4 Maths Chapter 12 Worksheet 3 **Solutions of Area offer comprehensive answers to textbook questions.

## DAV Class 4 Maths Ch 12 WS 3 Solutions

Question 1.

Fill in the blanks.

(a) The best unit of measuring area is ________.

Answer:

Square

(b) Measure of the amount of surface enclosed by a closed figure is called ________.

Answer:

Area

(c) Area of rectangle = Length × ________.

Answer:

Breadth

(d) Area of square = ________ × ________.

Answer:

Side × Side

(e) The area of a square having one side equal to 1 cm is ________.

Answer:

1 sq. cm

Question 2.

Find the area of a rectangle whose dimensions are given below:

(a) Length = 8cm Breadth = 3 cm

Answer:

Length = 8 cm Breadth = 3 cm

Area of rectangle = Length × Breadth

= 8 cm × 3 cm

= 24 cm2 or 24 sq. cm

(b) Length = 12cm Breadth = 9 cm

Answer:

Length = 12 cm, Breadth = 9 cm

Area of rectangle = Length × Breadth

= 12 cm × 9 cm

= 108 cm^{2} or 108 sq. cm

(c) Length = 32m Breadth = 12 m

Answer:

Length = 32 m, Breadth = 12 m

Area of rectangle = Length × Breadth

= 32 m × 12 m

= 384 m^{2} or 384 sq. m

(d) Length = 1m Breadth = 75 cm

Answer:

Length = 1 m, Breadth = 75 cm

Area of rectangle = Length × Breadth

= (1 m × 100) × 75 cm

= 7500 cm^{2} or 7500 sq. cm

Question 3.

Find the area of the following squares whose sides are given below:

(a) 6 cm

Answer:

Side of square = 6 cm

Area of square = side × side

= 6 cm × 6 cm

= 36 cm^{2} or 36 sq. cm

(b) 11 cm

Answer:

Side of square = 11 cm

Area of square = side × side

= 11 cm × 11 cm

= 121 cm^{2} or 121 sq. cm

Question 4.

The length of a carpet is 5 metres and the breadth is 2 metres. Find the area of the carpet.

Answer:

Length of carpet = 5 metres

Breadth of carpet = 2 metres

Area of carpet = Length × Breadth

= 5 metre × 2 metre

= 10 m^{2} or 10 sq. m

Question 5.

The length of the one side of a square handkerchief is 22 cm. Find the area of the handkerchief.

Answer:

Length of one side of square handkerchief = 22 cm

Area of square = side × side

= 22 cm × 22 cm

= 484 cm^{2} or 484 sq. cm

Question 6.

The length of a playground is 10 metres and breadth is 6 metres. Find the area of the playground.

Answer:

Length of playground = 10 metres

Breadth of playground = 6 metres

Area of playground = 10 m × 6 m

= 60 m^{2} or 60 sq. m

### DAV Class 4 Maths Chapter 12 Value Based Questions

Question 1.

How much field was irrigated by Raghu?

Answer:

Raghu irrigated \(\frac{1}{4}\) field area.

So, first we have to find area of the field. Then we have to divide it by 4.

Area of field = Length × Breadth

= 90 m × 40 m

= 3600 sq. m

Raghu irrigated \(\frac{1}{4}\) field area so

= Total area ÷ 4

= \(\frac{3600}{4}\)

= 900 sq. m

Question 2.

Which value is reflected by Raghu?

Answer:

Raghu showed value of kindness and of helping nature to the needy.

Question 3.

How can you help old people in their work?

Answer:

We can help old people in their work by:

(a) Bringing any needed item by them from nearby shops.

(b) Helping them in carrying their loads.

(c) Giving front position to the old people standing in a queue at public places like Bank, Post office etc.

### DAV Class 4 Maths Chapter 12 Worksheet 3 Notes

Units of Area:

The units used to measure area are:

- Square centimetre (sq. cm)
- Square metre (sq. m)
- Square millimetre (sq. mm)

Area of Rectangle And Square

- Area of rectangle = Length × Breadth
- Area of square = side × side

E.g. The length of a park is 20 metre and breadth is 7 metres find the area of the park.

Answer:

Length of park = 20 m.

Breadth of park = 7 m

Area = 20 × 7 m

= 140m^{2} or sq. m