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QA – Placement Quizzes | Clocks Clocks Clocks | Question 2

What is correct time and day of Ram’s magical watch, which gains uniformly 300 seconds slow at time 08:00 on Sunday and 348 fast at 20;00 on following Sunday. 

(A)



21 min past 7 pm and Wednesday

(B)



20 min past 7 pm and Thursday

(C)

21 min past 7 pm and Thursday

(D)

20 min past 7 pm and Wednesday

Answer: (D)
Explanation:

The given time from 8:00 am on Sunday to 8 pm on following Sunday = 7 days 12 hrs = 180 hrs. So, the clock gains = (5 + 29/5)min = 54/5 min in 180 hrs. Hence, 5 min are gained in (180 x 5/54 x 5)hrs = 83 hrs 20 min = 3 days 11 hrs 20 min. The clock is correct 3 days 11 hrs 20 min after 8 am of Sunday. So, the correct time and day will be 20 min past 7 pm on Wednesday.

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QA – Placement Quizzes
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