Three machines

The power of the three machines is 2: 3: 5. Two most powerful machines produce 400 parts per hour. How many components make all three machines in 3 hours?

Correct answer:

n =  1500

Step-by-step explanation:

p1=2+3+52=51=0.2 p2=2+3+53+5=54=0.8  h=400/p2=400/0.8=500  n=3 h=3 500=1500

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