How deep is the Well ?

The winding drum of a well is 30 cm in diameter.  If it takes five and a half turns of the handle before the bucket is in the water, how deep is the well (to the nearest 10 cm)?

 If the radius of the handle is 40 cm, how far has your hand travelled by the time the bucket has been brought to the top ?

 What are the advantages of this method of raising the bucket compared to simply dragging it up on the rope ?

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Last modified: June 18, 2007