Xu Yun looked at Zhao Zhiyi, although his attitude and words were very humble, he could still feel the young man's high spirits, he considered how to speak, so as not to hurt the sensitive self-esteem of the young Junjie, who had never suffered setbacks since childhood, "I can think of using the shadow of the sun to calculate the height of the mountain, the method is indeed intentional, as for the result of the calculation, we will keep it secret first," he smiled mysteriously, "Zhiyi, you go back to your seat first, and we will ask the next classmate to introduce her method to us." ”

Zhao Zhiyi nodded, smiled and took off his homework and left the podium.

Xu Yun waited for Zhao Zhiyi to sit down before he spoke: "Wang Qian, tell me about yours." ”

"Oh oh, Ah Qian, Ah Qian~" It was a bunch of rainbow farts again, Wang Qian snorted angrily, and walked up to the podium with neat movements.

"Actually, I listened to the Master's words, using the speed at which the snow melts to calculate the height of the mountain. I tried a lot of things before, but it didn't work, and I didn't find it until I finally found it. ”

Qianqianyu pointed at the top of the mountain, "I don't know if you all have noticed, only a piece of snow in the shade on the top of Luofu Mountain still has residual snow, and the snow in the rest of the place has already melted." ”

"Yes, Ah Qian, I noticed it too", Qin Yuanfan also observed, but he still didn't figure it out in the end.

"Well, that's right, I also heard from my master that I want to see the speed of ice and snow melting, and I also saw the snow at the top of the mountain, but I don't know what to do later," Zhu Xiaopang pouted in distress.

Wang Qian stuck out his tongue with bad intentions and laughed: "Slightly, it's not that you are too stupid hahahaha." ”

"Hahahaha......" exploded again.

Xu Yun: "Well, quiet", and then glared at Wang Qian.

Wang Qian: "I loaded a water bladder of snow, walked down the shady side from the top of the mountain, I counted my steps, stopped at a place 100 zhang from the top of the mountain, and then poured out the snow, exactly a quarter of an hour, and it needed to melt completely." ”

She looked down, each frowning, obviously hadn't figured it out yet, only Zhiyi showed a clear expression, she had to speak patiently: "Well, then I went back to the top of the mountain, loaded another water bladder of snow, and went down the same way, but this time I stopped at a place two hundred zhang away from the top of the mountain, where it took less than a quarter of an hour for the snow to melt, and I wrote it down, if a quarter of an hour can be divided into ten parts, then this place accounts for eight parts." ”

With two fingers in two places, she cleared her throat: "In this way, a hundred feet from the top of the mountain, a quarter of an hour; 200 zhang from the top of the mountain, 10 parts of a quarter of an hour account for eight; In this way, I can calculate that the height of Luofu Mountain is 600 zhang. Originally, I thought I was right, but unlike Zhiyi's, I'm not sure now. ”

She was a little confused, and turned her head to discuss with Zhiyi, but when she went down, she was startled, "Hey! What the hell are you guys, scare me to death! "The left hand kept soothing his little chest.

I saw that the classmates below all stretched their necks, their mouths wide open, like hanged ghosts.

"Zhiyi, what's wrong with them?" She looked at Zhao Zhiyi for help, not knowing what nerves they had.

Zhao Zhiyi looked at Wang Qian's frightened appearance and felt funny, "It's not that you scared them?" ”

Wang Qian's right index finger pointed at herself: "Me? I scared them, was there a mistake? ”

Zhao Zhiyi: "Yes, yes, it's just that you're scared, you're so smart, everyone is too stressed, and you're going crazy if you're not careful~" You're so smart, I'm also very stressed.

Wang Qian's eyes widened, and the next second he smiled and bent his eyes, and his mouth became a heart: "Haha, they all say that you are too stupid, hahahaha~"

Wan Jinyan pursed his mouth: "Ah Qian, you can speak more clearly, I still don't understand." ”

"Yes, yes, Ah Qian, you should be more careful."

"Yes, yes, why is 100 zhang a quarter of an hour, and then 200 zhang is a quarter of an hour's tenths of eight?"

"That's it, you're too jumpy, and you didn't even say how you calculated six hundred zhang in the end."

The protests below came and went, and it seemed that everyone really didn't understand.

Wang Qian scratched her head, but she didn't know how to explain it clearly, she looked at Xu Yun, just met Xu Yun's gaze at her, her heartbeat accelerated for a moment, and when she wanted to capture, Xu Yun had already looked away. After that, when Xu Yun looked over again, there was nothing.

He smiled at Wang Qian: "Wang Qian, you go down first, I'll explain it for you." ”

He raised his hands and motioned for everyone to be quiet, "Okay, okay, don't make any noise, listen to me." ”

"Let me first explain Wang Qian's calculation method, when we climbed the mountain yesterday, from the foot of the mountain to the top of the mountain, do you feel anything?"

"I'm getting more and more tired, I can't even crawl in the back," Zhu Xiaopang recalled painfully.

"Hahaha......"

Xu Yun shook his head: "Do you have any other feelings?" ”

"I feel colder and colder, obviously it is very warm to bask in the sun at the foot of the mountain, but on the top of the mountain, it is also basking in the sun, and it still feels cold." Jiang Shi can be carefully recalled.

"The wind is stronger at the top of the mountain, but there is no wind at the bottom of the mountain, Master, does this count?" Wan Jinyan asked.

Xu Yun: "What you said is right, but here we don't consider the wind, Jiang Shike is right, from the foot of the mountain to the top of the mountain, it is getting colder and colder." It is recorded in the "Lü's Spring and Autumn Period, Shen Dalan and Cha Jin" that "seeing the ice in the bottle and knowing the cold of the world", similarly, the snow we see on the top of the mountain is enough to illustrate this, and the foot of the mountain is already full of spring. ”

He paused slightly, and no one was very confused, before continuing: "Then let me ask you, why is there such a big difference between the top of Luofu Mountain and the foot of the mountain?" ”

"It's the height!" Unison.

"Exactly!" "Now you understand, did I say the day before yesterday that the height of a mountain can be calculated by the speed at which the snow melts?" ”

The bottom nodded like pounding garlic, "Mmmm, I understand~"

"The higher the mountain, the slower the snow melts, right?"

Keep pounding the garlic, "Yes! ”

"Then can we arbitrarily choose two heights, and then measure the snow melting rate on them, and then we can reverse the height of the mountain?"

Or pounded garlic, "Yes!" ”

"Oh oh oh ~ I understand, I finally understand."

"Ahh I also understand, this method is too good, what a brain, how can you think of it. ”

"That's right, kill me, I can't even think of it, Ah Qian is worthy of being the first prodigy of our Great Song Dynasty, I admire it so much~"

"Why, you're stupid, aren't you?" Wang Qian slapped the table angrily, and then the fools all laughed and trembled.

Xu Yun struggled to maintain order, "Okay, there is one last question, then you can talk about it, which is right, the four hundred and forty-seven zhang calculated by Zhiyi or the six hundred zhang of Wang Qian?" ”。

The mouth that had just been closed immediately became jubilant again, gossiping, each of them was red-faced, only the two protagonists in the question quietly leaned on one side and bit their ears, and I don't know whose ears were pierced and whose eyes hurt in this scene?