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Learn POLICE SI MCQs with answers [Page 1 of Department 58]
1) A mechanical grandfather clock is at present showing 7 hr 40 min 6 sec. Assuming that it loses 4 seconds in every hour, what time will it show after exactly 6 1/2 hours?
2) A clock goes slow from midnight by 5 minutes at the end of the first hour, by 10 minutes at the end of the second hour, by 15 minutes at the end of the third hour and so on. What will be the time by this clock after 6 hours?
(A) 5.15 a.m.
(B) 5.30 a.m.
(C) 6 a.m.
(D) 6.30 a.m.
Correct Answer - Option
(B)
Explanation :
Time lost I 1 hour = 5 min. Time lost in 6 hours = (5 × 6) min = 30 min.
After 6 hours, the correct time will be 6 a.m. and the clock will show 5.30 a.m.
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