A Subdivision Is Planned for Forty Houses, Each with Its

Multiple Choice

A subdivision is planned for forty houses, each with its own in-ground swimming pool. A contractor estimates it will take him 30 hours to build the first pool and that there is a 90% learning curve associated with this process. How long will it take to build the last pool?

A) 27.2 hours
B) 23.9 hours
C) 20.5 hours
D) 17.1 hours