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      Question

      A well with 30 metre inner diameter is dug 6 m deep.

      Earth taken out of it, has been evenly spread all around it to a width of 15 m to form an embankment. The height (in metres) of the embankment is :
      A 5 m Correct Answer Incorrect Answer
      B 4.5 m Correct Answer Incorrect Answer
      C 1.8 m Correct Answer Incorrect Answer
      D 2 m Correct Answer Incorrect Answer
      E 4.9 m Correct Answer Incorrect Answer

      Solution

      Let the required height = h metres Therefore, [(60/2)2 - (30/2)2] x h = (30/2)2 x 6 h = 2 m

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