SOLUTION: the external dimension of a closed cylindrical watertank made of concrete materials consist of its radius which is 3 meters and height is 8 meters.if the thinkness of the concrete

Question 1002230: the external dimension of a closed cylindrical watertank made of concrete materials consist of its radius which is 3 meters and height is 8 meters.if the thinkness of the concrete walls is 1 decimeter,find the volume of the concrete walls to the nearest m
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Internal radius, being meter less than the external, is . The internal height, which points in two directions, maybe up and down, is . A little more simply, height internally is .

Volume of the concrete walls, total volume minus the internal volume:

That is the basic beginning, just so you can see and understand.

, cubic meters
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