"I have two watches with a 12 hour cycle. One of them gains one minute a day and the
Channel: Doubtnut
Date: 05/04/2020

"I have two
 watches with a 12 hour cycle. One of them gains one minute a day and the
 other loses `1 1/2`
minutes per
 day. If I set them both at the correct time, how long will it be before they
 again tell the correct time together?
(a) 288
 days (b) 480 days (c) 720 days (d) 1440 days"