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A well a daimeter 3 m …

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A well a daimeter 3 m is dug 14 m deepthe earth taken downit has been spread evenly all around in a safe is circular ring of white women kurta to form a embarrassed made find the height of

    • Posted by Arushi Agrahari 5 years, 1 month ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Gaurav Seth 5 years, 1 month ago

    Height of the well = 14 m
    Diameter of the well = 3 m
    So, Radius of the well = 3/2 m
    Volume of the earth taken out of the well = πr²h
    = 22/7*(3/2)²*14
    = 99 cu m
    Outer radius of the embankment = R = (3/2 + 4)m = 11/2 m
    Area of embankment = outer area - inner area
    ⇒ = πR² - πr²
    = 22/7*[(11/2)² - (3/2)²]
    = 22/7*[(121/4) - (9/4)]
    = 22/7 × 112/4
    = 88 m²
    Height of the embankment = Volume/Area
    = 99/88
    Height of the embankment = 1.125 m

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