@Raj
Please repost can not see the question
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Clock
Source: Beat The GMAT — Problem Solving |
dkumar.83 wrote:Hi,
Kindly specify the detailed way to find this answer.
IMO C
1st clock loses 3 min/hr i.e. 72 min/day or 1.2 hr/day
2nd clock gains 5 min/hr i.e. 120 min/day or 2 hr/day
For losing 12 hrs 1st clock takes 10 days (12/1.2)
similarly for gaining 12 hrs 2nd clock takes 6 days (12/2)
Calculate LCM of 6 & 10, you will get 30
