Dont send me a copied answer.

A dam and reservoir will be used for control and production, hydroelectric power.

The costs and benefits are:

 Dam costs including the cost of opening roads, cleaning and financing = 39,160,000.  Production equipment and other machines = 20,000,000  Land = 2,750,000.  Relocation = 1,780,000.  Road replacement = 3,460,000.  Miscellaneous Expenses = 225,000.  2% of the total investment is included as operating cost and is increasing every year by 5%. The annual benefits are:  Prevented water losses = 1,250,000.  Increase in property value = 200,000.  Incremental exploitation value = 4,000,000. What is the cost benefit ratio when the time horizon is 40 years and the interest rate is 8%?