SOLUTION: A circular metal sheet 30cm in diameter and 0.25cm thick is melted and then recast into a cylindrical bar of 5cm. Find the length of the bar

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Question 876828: A circular metal sheet 30cm in diameter and 0.25cm thick is melted and then recast into a cylindrical bar of 5cm. Find the length of the bar
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
5cm what? Diameter?
Do you cylindrical rod instead of cylindrical bar?

Assuming the sheet was melted and recast as some length h and the 5 cm diameter, find the length h using the original volume from the original sheet.

v=0.25%2Api%2830%2F2%29%5E2=h%2Api%285%2F2%29%5E2
%281%2F4%29pi%2A15%5E2=h%2Api%2825%2F4%29
pi%2A15%5E2=h%2Api%2A25
h%2A25=15%5E2
h=%283%2A5%2A3%2A5%29%2F%285%2A5%29
highlight%28h=9%29 cm.