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Discussion :: Mensuration

  1. A 25 cm wide path is to be made around a circular garden having a diameter of 4 meters. Approximate area of the path is square meters is
    2. A.
    3.34
    B.
    2
    C.
    4.5
    D.
    5.5
    E.
    5

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    Answer : Option A

    Explanation :

    Area of the path = Area of the outer circle - Area of the inner circle = ∏{4/2 + 25/100}2 - ∏[4/2]2 

    = ∏[2.252 - 22] = ∏(0.25)(4.25)  { (a2 - b2 = (a - b)(a + b) } 

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