If one worker can assemble 9 products per hour, and another worker can assemble 6 products per hour, how long will it take them to assemble 50 products if they both start working at the same time

3 hours 20 minutes

Step-by-step explanation:

Together, the workers can assemble 9 + 6 = 15 products per hour. So the assembly of 50 products will take ...

(50 products) / (15 products/hour) = 50/15 hours = 3 1/3 hours

The two workers can assemble 50 products in 3 1/3 hours.