Between 11 O'clock and 12 O'clock, when the times at which the minutes and hour hands be at 60° with each other are 11 hours t1, min. and 11 hours t2 min., then t2 - t1 =
1
\(\frac{{360}}{11} \)
2
\(\frac{{220}}{11} \)
3
\(\frac{{240}}{11} \)
4
\(\frac{{420}}{11} \)