A wall clock gains 2 minutes in every 12 hours while a table clock loses 2 mins. every 36 hrs. Both are set right at 12 noon on Tuesday . The correct time when both show same time next woul be ?
options : (a) 1.30 at night, after 130 days
(b)12 midnight , after 135 days
(c) 12.30 at night ,after 130 days
(d) 12 noon, after 135 days
And table clock losses two min in every 36 hours .
So in every 36 hours they difference between them is 8 min.
They will be at the same time when the difference between them is 12 hours.[ as same time is required , not exact time ]
Hence 8 min = 36 hours
So 1 min difference in 36/8
Or 12 * 60 min difference in
Or 3240 hours is 135 days.
Hence both clocks will show same time at 12 noon after 135 days.
Option d is correct.