Question

A wall clock gets an extra 10 seconds every 2 minutes. If the clock was set at 10:00 AM, then what time is displayed at 10:00
PM on the same day?
10:45 PM
11:00 PM
10.30 PM
1015 PM​

Answer 1

Let the hours passed be x,
time shown on clock 1=8:00 p.m. tuesday (24+24+10 hrs)
60x-2x=58*60,
x=60hrs,
actual time=10:00 p.m.
time on clock 2=(60-1)*60=59hrs,
=9:00 p.m. tuesday.