How big should a 1.88-meter person's hand be? Do you have any data? For example, how long is the middle finger and how far is the little thumb from the big thumb?

How big should a 1.88-meter person's hand be? Do you have any data? For example, how long is the middle finger and how far is the little thumb from the big thumb?

The middle finger is 9cm (excluding nails), and the thumb to thumb is 18cm (hands open naturally)
A. B is 100km away from each other. A and B start from a and B on bicycles and travel in opposite directions. A's speed is 23km / h, B's speed is 21km / h, and a's speed is 21km / h
One hour later, b set out from B and asked how long it took a to meet B?
After a ride for an hour, B starts from B and asks how long it took a to meet B
The time passed when meeting B
(21-21) / (100)%
1.75 + 1 = 2.75 hours
A meets B after 2.75 hours
(100-23 * 1) / (23 + 21) = 77 / 44 = 7 / 4 hours
There are 60 tons of goods on the wharf, which can be transported in 12 hours by large trucks and 15 hours by small trucks. How many hours can two trucks transport at the same time?
Large trucks transport 60 / 12 = 5 tons per hour
Small truck transport 60 / 15 per hour = 4 tons
9 + 5 tons per hour
60 / 9 = 6.67 hours
What is the maximum distance between thumb tip and middle finger tip?
We call it a Zha. What's the written language?
It is called a tussah. Measure how many tussahs you have and use it to estimate the length of a section
A. The distance between two places is s = 100km. A and B start from two places by bicycle at the same time, and travel in opposite directions. The driving speed is V1 = 20km / h. If there is a hound running back and forth between a and B, the running speed is V2 = 30km / h. how much distance did the hound run from a and B to their meeting?
From v = ST: T = SV, suppose that the time from starting to meeting is t, then in time t, the time from starting to meeting is t = s2v1 = 100km (2 × 20) km / h = 2.5h; so the distance of hounds running back and forth in time t: S2 = v2t = 30km / h × 2.5h = 75KM. A: hounds have run 75KM
A batch of anti SARS materials can be transported by large trucks and small trucks at the same time, which can be completed in 6 hours. If large trucks are used to transport alone, it can be completed in 10 hours. If small trucks are used to transport alone, how many hours will it take?
1 ÷ (16 − 110) = 1 ÷ 115 = 15 (hours); a: it takes 15 hours to complete the single truck
A three-year-old can't count from 1 to 100. Does that mean he has poor intelligence?
It should not be counted. Children of this age have just begun to understand things. What parents need to do now is to guide them. Parents are their children's enlightening teachers. Just teach them slowly
From place a to place B, a and B need to ride for 4 hours and 6 hours respectively. Now a and B start from both places at the same time and face each other. The meeting time is 2 kilometers away from the midpoint of both places. If a and B turn back immediately after they arrive at place a, there is a gap between the second meeting place and the first meeting place______ Kilometers
Each time they meet is: 1 △ 512, = 2.4 (hours); 2 × 2 △ 2.4 △ 112, = 20 (kilometers); 20 × 14 × 2.4 × 3-20 = 36-20, = 16 (kilometers); 20 - (20 △ 2 + 2) = 20-12, = 8 (kilometers). 20-8 = 16 (kilometers) is the second time
A batch of goods can be transported in 6 hours by large trucks and small trucks at the same time. If they are transported by large trucks alone, they can be transported in 10 hours. If they are transported by small trucks alone, how many hours will it take? (Changshan County, Zhejiang Province)
A: it takes 15 hours to transport by truck
Two people count in turn. Each person can count one, two or three at a time, but they have to count. Whoever counts to 100 wins
It's mainly to make up a multiple of 4, so that the last few can win
If the first person counts one number, then three; first two, then two; first three, then one
In this way, the latter one can count to all the multiples of 4, and he will also be able to count to 100