Sam sets alarm at 5 am. But the clock loses 16 minutes in 24 hours. Effectively, the clock indicates 10:00 pm on the 4th day. Find out the original time of the clock:
(A) 9 pm
(B) 10 pm
(C) 11 pm
(D) 08 pm
Explanation: From the given information the time from 5 am on a day to 10 pm on the 4th day is 89 hrs.
So, 23 hrs 44 min of this clock = 24 hrs of correct clock.
Hence, 356/15 hrs of this clock = 24 hrs of correct clock.
89 hrs of the clock = (24 x 15/356 x 89)hrs of correct clock = 90 hrs of correct clock.
Hence, the original time will be 11 pm.
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