Question

A factory is currently running at 85% of its original capacity, and management is considering upgrading the equipment.

Answer 1

I will take the sugestion, so 85 units per month (100 is full capacity)


so while doing maintinance, the 6 months is wasted, 0 ouput, basically 85*6=510 lost

now we have to see how many months x it takes for the output to match

the output that would have been is
510+85x
the output now is 120x
so
510+85x=120x
minus 85x both sides
510=35x
divide both sides by 35
14.57=x
round up
15 months needed