New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A well with 20 m inside diameter is dug 10 m

    deep. Soil taken out of it has been evenly spread all around it to a width of 30 m to form an embankment. Find the height of the embankment.
    A 1/3 m Correct Answer Incorrect Answer
    B 3/4 m Correct Answer Incorrect Answer
    C 1/4 m Correct Answer Incorrect Answer
    D 2/3 m Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Volume of the soil dug out = π r 2h ⟹ (22/7) x 10 x 10 x 10) = 1000 π m³. Area of embankment = Area of embankment with well - Area of well = ( x 40 x 40) - ( x 10 x 10 ) = 1500π m² Height of embankment = `(Volume)/(Area)` [if gte msEquation 12]> Volume Area [if !msEquation]-->[endif]-->= (1000 π /1500 π) = 2/3 m.

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