Given: A ring wall is planned for the support of an oil tank. The ring wall measures 12″ thick by 30″ tall and has a 50` circumference. How many Cubic Yards of concrete are required for this ring wall? (Assume no waste.)

Given: A ring wall is planned for the support of an oil tank. The ring wall measures 12″ thick by 30″ tall and has a 50` circumference. How many Cubic Yards of concrete are required for this ring wall? (Assume no waste.)