If the whole journey is 1, the whole journey is completed.

6/7 divided by 3/4=8/7 hours.

Method 2: 3/4 of the whole journey, namely 1/4.

At this time, it is still 4 kilometers away from the artificial lake.

So the whole journey is 4 divided by 1/4= 16 km.

/kloc-3/4 of 0/6 km is equal to 16 * 3/4 = 12km.

12 km and walked for 6/7 hours, so I walked 1 hour:

12 divided by 6/7 = 14km.

So the whole process needs:

16 divided by 14=8/7 hours.

2. The film needs to be shown for 1 hour for 40 minutes, that is, 100 minutes.

Xiaofeng watched 9/ 10 of the whole movie, that is, he didn't watch it:

1-9/ 10= 1/ 10

So Xiaofeng was late100 *110 =10 minutes.

That is, when the movie was shown 10 minutes, Xiaofeng entered the cinema.

Do you understand?

Ha ha!