- A10 days
- B20 days
- C15 days
- D5 days
Step-by-Step Solution
They drift apart by min per hour. Two 12-hour dials look the same again when the gap is 12 min: days. (20 days uses 24 min.)
Answer: A) 10 days
Both clocks were set right at 12 noon, as shown. The clock on the left gains 2 minutes an hour and the one on the right loses 1 minute an hour. After how many days will they next show the same time?
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