Generally speaking, the little frog climbed for one minute and went down, and the result was an increase of 0.4 meters.

It seems that10/0.4 = just arrived at the ground in 25 minutes.

In fact, it reached 23*0.4=9.2 meters in the 23rd minute.

In the 23rd minute, it reached the highest level of 9.8m, and then dropped by 0.6m to 9.2m, which means that it could not climb out in the 23rd minute.

The next 24 minutes will be crucial,

The little frog will climb 1 m directly from 9.2m, but he only needs to climb 0.8m continuously to reach the ground, instead of climbing 0.6m after climbing 1 m, which means he will not climb 0.2m out of thin air, so he will climb 0.8m upward from the 23rd minute to reach the ground.

That is, it takes 23+0.8=23.8 minutes.