Answer:
The manufacturing time is 1.5385 minutes per unit.
Step-by-step explanation:
∵ The units manufactured by machine in 1 hour = 39,
We know that,
1 hour = 60 minutes,
∴ The units manufactured by machine in 60 minutes = 39,
That is,
39 units = 60 minutes,
⇒ 1 unit = [tex]\frac{60}{39}[/tex]=1.53846153846 ≈ 1.5385 minutes,
Hence, the manufacturing time is 1.5385 minutes per unit.