A utility company estimates that a power line repair job will take a total of 24 person-hours. If 3 workers are assigned to the job, how long will it take them to complete the job according to this estimate?
A 8 hours
B 12 hours
C 27 hours
D 72 hours

Question

A utility company estimates that a power line repair job will take a total of 24 person-hours. If 3 workers are assigned to the job, how long will it take them to complete the job according to this estimate?
 A 8 hours
 B 12 hours 
C 27 hours 
D 72 hours

anonymous · Answer

the rate of each person is 1/24. so 3 persons would be 3/24. And therefor, 3 persons can complete the job in 1/(3/24) = 8hrs