Answer:
20 minutes
Step-by-step explanation:
If Miguel can unload 10 boxes in 5 minutes, that means that he loads 2 boxes per minute. Assuming he he has a constant unloading speed, it would take him 20 minutes to unload all 40 boxes.
I found this by dividing 40 (boxes) by 2 (min per box)
Answer: 2 / 15
3 red / 10 total
4 white / 9 total
3/10 * 4/9 = 12/90 = 2/15
4m
45