A small metal shop operates 10 hours each day, producing 100 parts/hour. If productivity were increased 20%, how many hours would the plant have to work to produce 100parts?

The factory produces 100 parts in 50 minutes.

Explanation:

Giving the following information:

Current productibity= 100 parts/hour

Increase in productivity= 20%

This means that the factory makes 120 parts an hour or 100 parts in:

120 parts= 60 minutes

100 parts= x

x= (100*60) / 120

x= 50 minutes

The factory produces 100 parts in 50 minutes.