Riverside Metal Works produces cast bronze valves on a 10-person assembly line. On a recent day, 160

Question:

Riverside Metal Works produces cast bronze valves on a 10-person assembly line. On a recent day, 160 valves were produced during an 8-hour shift.
(a) Calculate the labor productivity of the line.
(b) The manager at Riverside changed the layout and was able to increase production to 180 units per 8-hour shift. What is the new labor productivity per labor-hour?
(c) What is the percentage of productivity increase?