Measurement of Area

  • The area of an object is the surface occupied by it.
  • The S.I unit of area is square metre (m2).
  • Other units of area are cm2.
  • 1 cm2= 10-4 m2.
  • The area of an irregular lamina is approximately found by using a graph paper.

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  • Q1

    In the figure given below, find the area of the shaded portion and the area of the remaining portion.

    Marks:5
    Answer:


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  • Q2

    A wire of length 44 cm, it is bent into the shape of a circle. Find the radius of that circle. Also, find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more area – the circle or the square?

    Marks:5
    Answer:


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  • Q3

    What do you understand by the area of an object? Give S.I unit of area.

    Marks:1
    Answer:

    Area of an object is the amount of surface occupied by that object. Square meter is the standard unit of measurement of area.

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  • Q4

    Name the units in which we will measure the area of the following objects

    (i) Area of our classroom, (ii) Area of a district.

    Marks:1
    Answer:


    (i)
    The area of classroom is measured in m2
    (ii)
    The area of district is measure in km2

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  • Q5

    Give two multiple and sub-multiple of standard unit of area.

    Marks:1
    Answer:

    The standard unit of area is metre square (m2 ).

    Two multiple of m2 are hectare and square kilometer.

    Two sub-multiple of m2 are square centimetre and square millimetre.

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