24 * 3 = 72 minutes lost each day
24 * 60 = 1440 minutes per day
1440/72 = 20 days gained.
Take it from there.
A 24hr digital hour digital clock is gaining three minutes every hour. If you set it to the correct time at 6p.m. on a Saturday, when will it show the correct time again?
2 answers
it takes 20 hr to gain an hour
so, in 24 * 20 hr it will show the correct time
so, in 24 * 20 hr it will show the correct time