Refer back to Example 10-2. In addition to the benefits and costs, suppose that
there are disbenefits associated with the runway extension project. Specifically,
the increased noise level from commercial jet traffic will be a serious nuisance
to homeowners living along the approach path to the Columbia Municipal
Airport. The annual disbenefit to citizens of Columbia caused by this noise
pollution is estimated to be $100,000. Given this additional information, reapply
the conventional B–C ratio, with equivalent annual worth, to determine
whether this disbenefit affects your recommendation on the desirability of
this project.