STEM curriculum for K-12 - TeachEngineering
Cost Comparisons Worksheet
1. To estimate the cost of different length girders in concrete and steel, complete the table below. Show all your work and calculations. Use the following information to complete your calculations:
1 cubic yard of concrete = 27 cubic feet of concrete
1 ton of steel = 4.08 cubic feet of steel
B |L |Length |Volume =
B x L x Length |Volume (cu.yd.) = ft3 ÷ 27 |Cost of Concrete |Total Cost Using Concrete |Volume (tons) =
ft3 ÷ 4.08 |Cost of Steel |Total Cost Using Steel | |1 ft |1 ft |20 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |2 ft |20 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |3 ft |20 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |4 ft |20 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |5 ft |20 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |1 ft |40 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |2 ft |40 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |3 ft |40 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |4 ft |40 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |1 ft |5 ft |40 ft | | |$65.10 per cubic yard | | |$2,000 per ton | | |
2. Create two graphs below, using information from the table.
Total Cost Using Concrete
Total Cost Using Steel
-----------------------
Cost ($)
Volume (ft3)
Cost ($)
Volume (ft3)
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