Perimeter

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  • Q1

    The side of a square whose perimeter is 100 cm, is

    Marks:1
    Answer:

    25 cm

    Explanation:

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  • Q2

    The perimeter of a rectangle is 360 cm and length is 100 cm. Its breadth will be

    Marks:1
    Answer:

    80 cm

    Explanation:

    Let the breadth = x cm,

    Perimeter of rectangle = 2(length + breadth)
                  360 = 2(100 + x)
                  360 = 200 + 2x
                    2x = 360 – 200
             2x = 160
              x = 80 cm

    Hence, breadth of rectangle = 80 cm
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  • Q3

    Pinky runs around a square field of side 75 m and Bobby runs around a rectangular field with length 160 m and breadth 105 m.

    How much more distance was covered by Bobby?

    Marks:1
    Answer:

    230 m

    Explanation:

    Pinky runs around a square field.
    side of the square field = 75 m
    Distance covered by Pinky = 4 × 75
                                           = 300m
    Bobby runs around a rectangular field.
    length of the field = 160 m and breadth = 105 m
    Distance covered by Bobby = 2×(l + b)
    = 2×(160+105)
    = 2 × 265
    = 530 m
    So,
    Bobby covered more distance = 530 – 300
    = 230m

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  • Q4

    The perimeter of a rectangle whose length and breadth are 25 cm and 15 cm respectively, is

    Marks:1
    Answer:

    80 cm

    Explanation:

    We know that the perimeter of a rectangle = 2×(length + breadth)

    Hence, the perimeter of the given rectangle = 2×(25 + 15) cm

                                                                   = 2×(40) cm

                                                                   = 80 cm

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  • Q5

    The perimeter of a regular hexagon with each side measuring 8 m is

    Marks:1
    Answer:

    48 m

    Explanation:

    Perimeter of a regular hexagon = 6 × (side)

    Hence, the perimeter of the given hexagon = 6 × (8) m

                                                                  = 48 m

    View Answer