I think that many people forgot that an important point: you have to know the size of "a production order" that two machines, J and R, ran continuously at uniform rates to fill. We have:
(1) Machine R produces 6 orders per hour.
(2) Machine J produces 4 orders per hour.
=> we only know that in 1 hour, 2 machine can produce 10 orders. But the question doesn't say anything about how many orders are there in "a production order" that 2 machine have to fill. This "production
...
(1) Machine R produces 6 orders per hour.
(2) Machine J produces 4 orders per hour.
=> we only know that in 1 hour, 2 machine can produce 10 orders. But the question doesn't say anything about how many orders are there in "a production order" that 2 machine have to fill. This "production
...
.jpg)
