Among the two clocks, clock A gains 20 seconds per minute. If clock A and B are set at 2 0'clock, when clock A is at 7:20, what does clock B show? Options
A) 5:30  B) 6:00  C) 5:45  D) 6:20  E) 3:30
Clock A gains 20 seconds per minute, 1200 seconds per hour or 20 minutes per hour.   The two clocks show 2:00 at 2 0'clock   At 3:00 -   Clock 6:00 is at 3:00   Clock A is at 3:20 (1 hour + gains 20 minutes)   AT 4:00 -   Clock 6:00 is at 4:00   Clock A is at 4:40 (2 hours + gains 40 minutes)   In 4 hours the clock A gains  4*20= 
<gadget id="calculator"> 4*20</gadget>
<output>80</output>
80 minutes or 1 hour 20 minutes   If clock A is at 7:20 the clock 6:00 is at 6:00   Answer is 6:00
<result>B</result>
Among the two clocks, clock A gains 20 seconds per minute. If clock A and B are set at 2 0'clock, when clock A is at 7:20, what does clock B show?