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Calculate the areas of the following rectangles: a) Length = 21 cm, Breadth = 17 cm b) Length = 24 cm, Breadth = 18 cm c) Length = 1 m, Breadth = 70 cm d) Length = 2 m, Breadth = 50 cm e) Length = 4 m

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6 parts
a

357 cm2\text{357 cm}^2

b

432 cm2\text{432 cm}^2

c

7000 cm2\text{7000 cm}^2

d

10000 cm2\text{10000 cm}^2

e

30000 cm2\text{30000 cm}^2

f

40000 cm2\text{40000 cm}^2

Step-by-step solution

12 steps

Here are the areas of the rectangles for question 8:

The formula for the area of a rectangle is Area=length×breadthArea = length \times breadth.

Part a· 2 steps

  1. Identify the given dimensions.

    Length =21 cm= 21 \text{ cm}
    Breadth =17 cm= 17 \text{ cm}

  2. Calculate the area.

    Area=21 cm×17 cm=357 cm2Area = 21 \text{ cm} \times 17 \text{ cm} = 357 \text{ cm}^2

    The area is 357 cm2\boxed{\text{357 cm}^2}.

Part b

432 cm2\text{432 cm}^2

  1. Identify the given dimensions.

    Length =24 cm= 24 \text{ cm}
    Breadth =18 cm= 18 \text{ cm}

  2. Calculate the area.

    Area=24 cm×18 cm=432 cm2Area = 24 \text{ cm} \times 18 \text{ cm} = 432 \text{ cm}^2

    The area is 432 cm2\boxed{\text{432 cm}^2}.

Part c

7000 cm2\text{7000 cm}^2

  1. Identify the given dimensions and convert to consistent units.

    Length =1 m=100 cm= 1 \text{ m} = 100 \text{ cm}
    Breadth =70 cm= 70 \text{ cm}

  2. Calculate the area.

    Area=100 cm×70 cm=7000 cm2Area = 100 \text{ cm} \times 70 \text{ cm} = 7000 \text{ cm}^2

    The area is 7000 cm2\boxed{\text{7000 cm}^2}.

Part d

10000 cm2\text{10000 cm}^2

  1. Identify the given dimensions and convert to consistent units.

    Length =2 m=200 cm= 2 \text{ m} = 200 \text{ cm}
    Breadth =50 cm= 50 \text{ cm}

  2. Calculate the area.

    Area=200 cm×50 cm=10000 cm2Area = 200 \text{ cm} \times 50 \text{ cm} = 10000 \text{ cm}^2

    The area is 10000 cm2\boxed{\text{10000 cm}^2}.

Part e

30000 cm2\text{30000 cm}^2

  1. Identify the given dimensions and convert to consistent units.

    Length =4 m=400 cm= 4 \text{ m} = 400 \text{ cm}
    Breadth =75 cm= 75 \text{ cm}

  2. Calculate the area.

    Area=400 cm×75 cm=30000 cm2Area = 400 \text{ cm} \times 75 \text{ cm} = 30000 \text{ cm}^2

    The area is 30000 cm2\boxed{\text{30000 cm}^2}.

Part f

40000 cm2\text{40000 cm}^2

  1. Identify the given dimensions and convert to consistent units.

    Length =5 m=500 cm= 5 \text{ m} = 500 \text{ cm}
    Breadth =80 cm= 80 \text{ cm}

  2. Calculate the area.

    Area=500 cm×80 cm=40000 cm2Area = 500 \text{ cm} \times 80 \text{ cm} = 40000 \text{ cm}^2

    The area is 40000 cm2\boxed{\text{40000 cm}^2}.

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