A Company Owns a Machine That Will Produce 100 Light

Multiple Choice

A company owns a machine that will produce 100 light switches in four hours. Due to increased demand, a second machine capable of producing 100 light switches in three hours has been added. Approximately how many hours will it take to produce 100 light switches using both machines working together?

A) 7.0
B) 3.5
C) 1.7
D) 0.58