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:
Choices:
A) 4 am  B) 4 pm  C) 5 am  D) 6 am  E) 6 pm
time 7 am to 4.15 pm = 37/4   37/720 hrs 1/20==&gt;37/4   clock  (1/20*720/37*37/4)= 
<gadget id="calculator">  (1/20*720/37*37/4)</gadget>
<output>9</output>
9 hrs after 7 am==&gt; 4 pm   ANSWER 4 pm
<result>B</result>
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: