42. Starting from 12 o'clock, after $\qquad$ minutes the hour hand and the minute hand form a $90^{\circ}$ angle for the first time, and when the hour hand and the minute hand form a $90^{\circ}$ angle for the second time, the time is $\qquad$ _.
Reference answer: $16 \frac{4}{11}, 12$ at $49 \frac{1}{11}$ minutes