A watch which gains 5 seconds in three minutes was set at 7am.In the afternoon of the same day when the true time is 1p.m. The watch will indicate-

A 1:10 pm

B 1:05 pm

C 1:12 pm

D 12:55 pm

Correct Answer: Option A

Time difference 1 PM-7AM=6 Hour=360 minute

3 Minutes gains from 5 second

1 minutes gains from 5/3 second

360 minutes gains from 5×360/3

=600 second = 10 min

the watch will indicate:1 PM + 10 min=1:10 PM