A defective clock is set correctly at 12 nn.However it registers only fifteen mins. for each hr.In how many hr.will it again register the correct time?
4 answers
32 hours (8:00 p.m.of the next day)
Can you please enlighten more how it is. Thank you.
If the time in the defective clock says 12:15 p.m., then,it means 1:00 p.m. in the normal clock.
So, an hour in the def.clock is equal to 4 hours in norm.clock. I list the time in the defective clock and the original time.
So, an hour in the def.clock is equal to 4 hours in norm.clock. I list the time in the defective clock and the original time.
Defect. time/No. of Hours/Orig.time
12pm-1pm / 4hrs / 12pm-4pm
1pm-2pm / +4hrs / 4pm-8pm
2pm-3pm / +4hrs / 8pm-12am
3pm-4pm / +4hrs / 12am-4am
4pm-5pm / +4hrs / 4am-8am
5pm-6pm / +4hrs / 8am-12pm
6pm-7pm / +4hrs / 12pm-4pm
7pm-8pm / +4hrs / 4pm-8pm
TOTAL TIME: 32hrs (observe that the def.time and orig.time meet at 8pm)
12pm-1pm / 4hrs / 12pm-4pm
1pm-2pm / +4hrs / 4pm-8pm
2pm-3pm / +4hrs / 8pm-12am
3pm-4pm / +4hrs / 12am-4am
4pm-5pm / +4hrs / 4am-8am
5pm-6pm / +4hrs / 8am-12pm
6pm-7pm / +4hrs / 12pm-4pm
7pm-8pm / +4hrs / 4pm-8pm
TOTAL TIME: 32hrs (observe that the def.time and orig.time meet at 8pm)