Building Materials

Step1: Plan the cost per mile.  The following materials are listed below with a price per unit.  You are also provided with the number of units that will be needed per mile of road for each item.  Figure out how much is will cost per item to build a mile of road.  After you have the individual costs, you will need to add the totals together to calculate the total material cost per mile of road.

Building Supplies:
Lime Mortar=25 cents per ton (you need 20 tons per mile)
Stones=20 cents per ton (you need 25 tons per mile)
Mortar=$1.oo per ton (you need 10 tons per mile)
Concrete=75 cents per ton (you need 20 tons per mile)
Broken Pottery=40 cents per ton (you need 20 tons per mile)
Stone Blocks=1 cent each (you need 24,099 blocks per mile)

Extras:
Bridges=Add $250 to your cost for each bridge needed
 

Step 2: There are four different road routes that can be built.  They each include different terrain, bridges, and lengths.  Using your cost per mile of road information, and the additional information provided below, calculate the cost to build each road.

Route A: This route is 150 miles long and will need 2 bridges.

Route B: This route is 100 miles long, will need 3 bridges, 20 miles of mountains, and 30 miles of desert.

Route C: This route is 125 miles long, will need 10 miles of mountains, and 5 bridges.

Route D: This route is 175 miles long and will need 1 bridge.
 

Step 3: Rejoin your partner, return to the main activity 3 page, and answer the team questions.