Multiple choice

A watch gains 12 seconds every 3 hours, what time will it show at 10 A.M. on Tuesday if the watch is set right at 3 A.M. on Sunday?

  1. 09 hrs 58 minutes

  2. 09 hrs 57 minutes 8 seconds

  3. 10 hrs 2 minutes

  4. 10 hrs 3 minutes 40 seconds

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

From Sunday 3 AM to Tuesday 10 AM is 48 + 7 = 55 hours. The watch gains 12 seconds every 3 hours, so in 55 hours it gains (55/3) * 12 = 220 seconds = 3 minutes and 40 seconds. The watch will show 10:03:40 AM.