easy · GMAT Quant
A commercial water filtration plant operates two auxiliary pumps. Pump 1 automatically runs a backwash cycle every 8 hours, and Pump 2 runs a backwash cycle every 10 hours. Both pumps start a backwash cycle at 8:00 AM on Monday. Over a continuous 120-hour operational period starting at 8:00 AM on Monday, on
How many occasions do both pumps start a backwash cycle simultaneously, including the initial start at 8:00 AM?
- 2
- 3
- 4
- 5
- 12
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