A

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Q. A watch which gains uniformly is 2 minutes slow at noon on Sunday and is 4 min. 48 sec fast at 2 p.m. on the following Sunday. When it has shown the correct time ?

  • (A) 2 : 00 p.m. on Monday
  • (B) 2 : 00 p.m. on Tuesday
  • (C) 3 : 00 p.m. on Wednesday
  • (D) 1 p.m. on Thrusday
  • Correct Answer - Option(B)
  • Views: 7
  • Filed under category Math
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Explanation by: Admin
Time from 12 p.m. on Sunday to 2 p.m. on the following Sunday = 7 days 2 hours.
= 24 x 7 + 2 = 170 hours.
The watch gain = (2 + 4 x 4/5) min = 34/5 minute in 170 hrs.
Since, 34/5 min are gained in 170 hrs.
2 min are gained in (170 x 5/34 x 2) hrs = 50 hours i.e., 2 days 2 hrs. after 12 p.m. on Sunday i.e., it will be correct at 2 p.m. on Tuesday.

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