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A bucket of height 8 cm and made up o...

A bucket of height 8 cm and made up of copper sheet is in the form of frustum of a right circular cone with radii of its lower and upper ends as 3 cm and 9 cm respectively. Calculate the height of the cone of which the bucket is a part. the volume of water which can be filled in the bucket. (iii) the area of copper sheet required to make the bucket.

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