1.Fill in the blanks.
(a) The best unit of measuring area is m2
(b) Measure of the amount of surface enclosed by a closed figure is called Area.
(c) Area of a rectangle = Length x Breadth
(d) Area of a square = Length x Length
(e) The area of a square having one side equal to 1 cm is 1 cm2
2. Find the area of a rectangle whose dimensions are given below:
(a) Length = 8 cm Breadth = 3 cm
(b) Length = 12 cm Breadth = 9 cm
(c) Length = 32 m Breadth = 12 m
(d) Length = 1 m Breadth = 75 cm
Solution:
(a) Area of a rectangle = Length x Breadth
Length = 8 cm Breadth = 3 cm
Area of a rectangle = 8 *3 =24 cm2
(b) Area of a rectangle = Length x Breadth
Length = 12 cm Breadth = 9 cm
Area of a rectangle = 12 *9 =108 cm2
(c) Area of a rectangle = Length x Breadth
Length = 32 m Breadth = 12 m
Area of a rectangle = 32 * 12= 384 m2
(d) Area of a rectangle = Length x Breadth
Length = 1 m Breadth = 75 cm
Area of a rectangle = 1 m * 0.75 m= 0.75 m2
3.Find the area of the following squares whose sides are given below: (a) 6 cm (b) 11 cm
(a) Area of a square = Length x Length
Length =6 cm
Area of a square = 6 cmx 6 cm = 36 cm2
(b) Area of a square = Length x Length
Length =11 cm
Area of a square = 11 cmx 11 cm = 121 cm2
4. The length of a carpet is 5 metres and the breadth is 2 metres. Find the area of the carpet.
Area of a Carpet = Length x Breadth
Length = 5 m Breadth = 2 cm
Area of a Carpet = 5 m x 2 m = 10 m2
5. The length of the one side of a square handkerchief is 22 cm. Find the area of the handkerchief.
Area of a Handkerchief= Length x Length
Length = 22 cm
Area of a Handkerchief = 22 cm x 22 cm = 484 cm2
6. Length of a playground is 10 metres and breadth is 6 meters. Find the area of playground.
Solution:
Area of a Playground = Length x Breadth
Length = 10 m Breadth = 6 m
Area of a Handkerchief = 10 m x 6 m = 60 m2