A watch which gains 5 seconds in 3 minutes was set right at 7 a.m. In the afternoon of the same day, when the watch indicated quarter past 4 o'clock, the true time is?

• a watch gains 5 sec for 3min.. so 1hr it get 100sec.
  watch indicated 4.15.. so totally 9hr.
  9hr=900sec .. so 900/60=15min.. so original time is 4pm
• 11 years agoHelpfull: Yes(1) No(3)