An Automobile Factory Produces Two Models

Multiple Choice

An automobile factory produces two models.The first model requires 1 hour to paint and hour to polish.The second requires 1 hour for each process.During each hour that the assembly line is operating,there are 100 hours available for painting and 80 hours for polishing.How many of the first model can be produced each hour if all the hours available are to be used?

A) 70
B) 60
C) 50
D) 40
E) 30