SOLUTION: A copper cylindrical rod of diameter 14cm and length 47cm is melted and recast into a wire of diameter 8mm .Find the length of the wire,giving your answer in meters.

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Question 1159939: A copper cylindrical rod of diameter 14cm and length 47cm is melted and recast into a wire of diameter 8mm .Find the length of the wire,giving your answer in meters.
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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Volumes equality equation, in cubic centimetres


    pi%2A%2814%2F2%29%5E2%2A47 = pi%2A%280.8%2F2%29%5E2%2Ax


    %2814%2F2%29%5E2%2A47 = %280.8%2F2%29%5E2%2Ax    

 
    7%5E2%2A47 = 0.4%5E2%2Ax


    x = %287%5E2%2A47%29%2F0.4%5E2 = 14393.75 cm = 143.9375 meters.    ANSWER


You can round the answer as you want.

Solved.