Concrete Forming

concrete forming tubes are used as molds for cylindrical like concrete supports. The volume V of a tube is the product of its like L and the area A of its circular base. You can make 2/3 ft^3 of cement per bag. write a rule to find the number of bags of cement needed to fill a 4 foot tube long as a function of its radius r. how many bats are needed to fill tube with a 4 inch radius? a 5 inch radius? a 6 inch radius?

-What us a rule for the volume V of any tube?

-What operation do you use to find the number of bags needed for a given volume?

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