In every 30 minutes the time of a watch increases by 3 minutes. After showing the correct time at 5 a.m; what time will the watch show after 6 hours? (Bank P.O., 2009)
(a)10 : 54 a.m.
(b)11 : 30 a.m.
(c)11 : 36 a.m.
(d)11 : 42 a.m.
(e)11:38 p.m.
Answer
Answer (as printed): C
Explanation
Time gained in 1 hour = 6 min. Time gained in 6 hours $=(6 \times 6) \mathrm{min}=36 \mathrm{min}$. After 6 hours, the correct time is 11:00 a.m. and the watch will show 11:36 a.m.