A welder completes 5 joints in 2 hours. At the same pace, how many joints can be completed in a 9 hour shift?

Correct answer to question 186 (Arithmetic Reasoning): 22.5 joints

Method

Convert the rate to joints per hour, then scale it up. 5 joints in 2 hours is 2.5 joints per hour, and 2.5 x 9 gives 22.5 joints in a nine hour shift.