A well 20 m in diameter is dug 14 m deep and the earth taken out is spread all around it to a width of 5 m to form an embankment . The height of the embankment is :

A well 20 m in diameter is dug 14 m deep and the earth taken out is spread all around it to a width of 5 m to form an embankment . The height of the embankment is :
1). 10 m
2). 11 m
3). 11.2 m
4). 11.5 m

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