Two clocks are set correctly at 1 0'clock in the afternoon. One keeps correct time. The other gains 5 seconds per minute. That evening, when
the fast clock shows 6:20, what does the correct clock show?
Choose the correct choice from the following choices: A) 4.0 B) 5.0 C) 6.0 D) 7.2 E) 3.5
Faster clock gains 5 seconds per minute or   5*60= 
<gadget id="calculator">  5*60</gadget>
<output>300</output>
300 seconds or 5minutes per hour.   Both clocks are set at 1:00   At 2:00   correct clock is at 2:00   faster clock is at 2:05:00 (1 hour + gained 5 minutes)   At 3:00 -   correct clock is at 3:00   faster clock is at 3:10:00 (2 hours + gained 10 minutes)   .   In 5 hours, faster clock would gain 20 minutes. It will show 6:20. At that point, the correct clock would show 6:00.   Answer is 6.0
<result>C</result>
Two clocks are set correctly at 1 0'clock in the afternoon. One keeps correct time. The other gains 5 seconds per minute. That evening, when
the fast clock shows 6:20, what does the correct clock show?