At 6′o a clock ticks 6 times. The time between first and last ticks is 20 seconds. How long does it tick at 12′o clock
Choose the correct answer.
A) 47  B) 76  C) 44  D) 66  E) 11
Explanation:   For ticking 6 times, there are 5 intervals.   Each interval has time duration of   20/5= 
<gadget id="calculator">  20/5</gadget>
<output>4</output>
4 secs   At 12 o'clock, there are 11 intervals,   So total time for 11 intervals= 11 × 4 = 44 secs.   Answer: 44
<result>C</result>
At 6′o a clock ticks 6 times. The time between first and last ticks is 20 seconds. How long does it tick at 12′o clock