35 minutes, 20 seconds /60 minutes =53/90
From 9: 00 to 10: 00, one * * *, five cars.
When the hour hand goes up at 9 o'clock, the square of 53/90*5=53/ 18 is between 47 and 48.
The minute hand is between 35 and 36 squares.
So a * * has 36 to 47 small lights. A * * 12。
1
A 90-degree meeting was held just after 7: 20.
A little after 7: 50, it was 90 degrees at one time.
Just after 8: 25, it was 90 degrees.
There is a period of time between topics.
It means a little after 7: 20.
The end time is a little over 8: 25.
Divide the clock into 60 units.
At 90 degrees, this means that it is only 15 square short.
Let 7: 20+x minutes be 90 degrees.
The minute hand walks 60 squares and the hour hand walks 5 squares.
112 means that the hour hand is the minute hand.
(20+x)/ 12+35 = 20+x+ 15
35 is the position of 7 o'clock, and 15 is 90 degrees apart.
12x=20+x
X=20/ 1 1 approximately = 1.8.
So the story starts at 7 o'clock, 2 1.8, which means 7 o'clock, 2 1: 49.
Calculate the end time in the same way.
(25+x)/ 12+40 = 25+x+ 15
X=25/ 1 1 approximately =2.27.
That was at 8: 27: 27, that is, 8: 27, 16 seconds.