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Learn RAILWAY MCQs with answers [Page 12 of Department 179]

M

Mr. Dubey • 51.47K Points
Coach Reasoning 

111) If real time is 12:10 then what will be mirror image of that clock?

(A) 10:50
(B) 11:50
(C) 12:50
(D) 1:50
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Correct Answer - Option (B)

Explanation :
Shortcut is to subtract the given time from 11:60 (As mentioned in key Point N). Thus the correct time is 11:60 - 00:10 = 11:50 because 12:10 mean 00:10.

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M

Mr. Dubey • 51.47K Points
Coach Reasoning 

112) A watch gain 8 seconds in 4 minutes and was set right at 4 AM. What time will it show at 11 PM on the same day?

(A) 11:08
(B) 12:38
(C) 11:38
(D) 12:08
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Correct Answer - Option (C)

Explanation :
8 Seconds in 4 Minutes mean 120 Seconds (or 2 Minutes) in one hour. From 4AM to 11PM (on the same day) = 19 hours So, total seconds gain in 19 hours = 19 X 120 (Seconds gain per hour) = 2280 Seconds. Now, 2280 Seconds = 38 Minutes (i.e. 2280/19 = 38) Thus incorrect clock will show 11:38PM at 11PM.

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M

Mr. Dubey • 51.47K Points
Coach Reasoning 

113) A clock loses 5 minutes every hour and was set right at 11AM on a Monday. When will it show the correct time again?

(A) 11AM on Sunday
(B) 11AM on Monday
(C) 11AM on Tuesday
(D) 11AM on Wednesday
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Correct Answer - Option (A)

Explanation :
As mentioned in Key Point O, faulty clock will show correct time when it loses or gains 12 Hours. In the given problem, clock loses 5 Minutes in an hour. So, 1 Minute lost in every 12 minutes (60 minutes / 5 minutes = 12 minutes). Now, for losing 12 hours i.e. 720 Minutes(12 X 60 = 720) it will take 720 X 12 = 8640 Minutes = 144 Hours = 6 Days. So, Clock will show correct time after 6 days from 11AM Monday. Thus, Answer is 11AM on Sunday.

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M

Mr. Dubey • 51.47K Points
Coach Reasoning 

114) My watch, which gains uniformly, is 2 min and show at noon on Sunday, and is 4 min 48 seconds fast at 2PM on the following Sunday when was it correct?

(A) Wednesday noon
(B) Sunday 2PM
(C) Monday noon
(D) Tuesday 2PM
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Correct Answer - Option (D)

Explanation :
At noon on Sunday watch gains 2 Minutes. And at 2PM on following Sunday it is 4 Minutes 48 Seconds fast. So, it gains 6 Minutes 48 Seconds i.e. 2 Minutes + 4 Minutes 48 Seconds (total 408 Seconds) in 170 Hours (Hours from Sunday Noon (12PM) to following Sunday 2PM) Therefore, watch gains 120 Seconds (2 Minutes) in 170*120/408 = 50 Hours 50 Hours = 2 Days 2 Hours Thus, Watch was correct after 2 days 2 hours from Sunday noon that is Tuesday 2PM.

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You are learning MCQ Questions of RAILWAY Department : 179 | Page : 12

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