Question 35

A watch loses 5 minutes every hour and was set right at 6 a.m. on a Monday. When will it
show the correct time again?

Solution

For the watch to show the correct time again, it should lose 12 hours.
It loses 5 minutes in 1 hour.
⇒ It loses 1 minute in 12 minutes.
⇒ It will lose 12 hours (or 720 minutes) in 720 × 12 minutes = 8640 minutes = 144 hours = 6 days.
⇒Thus, the clock will show the correct time again at 6am on next Sunday.

So , the answer would be option a) 6 a.m. on next Sunday.

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A watch loses 5 minutes every hour and was set right at 6 a.m. on a Monday. When will itshow the correct time again?

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A watch loses 5 minutes every hour and was set right at 6 a.m. on a Monday. When will it
show the correct time again?