SOLUTION: The world's longest bridge is 3 separate tunnles built side by side each is a half cylinder that is 50,000 meters long and 4 meters high. How many cubic meters of dirt had to be r

Question 214831: The world's longest bridge is 3 separate tunnles built side by side each is a half cylinder that is 50,000 meters long and 4 meters high. How many cubic meters of dirt had to be removed to build the tunnel?
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
volume of a cylinder is
each of these tunnels is one half of a cylinder.
l = 50000 meters
r = 4 meters.
volume of each tunnel is = 1,256,637.061 cubic meters.
3 * that = 3,769,911.184 cubic meters.
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that's how much dirt had to be removed.
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