Number of hours

Question

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 1000 parts?

A) less than 2 hours

B) between 9 and 10 hours

c) between 2 and 6 hours

D) between 6 and 8 hours

E) between 8 and 9 hours

Answer 1

100 parts were produced in 1 hour

Increase in productivity = 20%

New productivity:

100 x (1 + 0.2) = 100 x 1.20 = 120

120 parts would be produced in 1 hour

Number of hours the plant would have to work to produce 1000 parts = 1000/120 = 8.33 hours

E) between 8 and 9 hours