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1. If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B. working together, polish 50x units?
- A. 240
- B. 240
- C. 240
- D. 240
Answer: Option A
Explanation:
ATQ:
x/12 + 5x/40 = 50x/1
or, 10x+15x/120 = 50x/1
So, 240.
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