The number of male workers in a factory is one seventh more than that of female workers, and the number of female workers accounts for a few percent of the whole factory, and the reasons are explained

The number of male workers in a factory is one seventh more than that of female workers, and the number of female workers accounts for a few percent of the whole factory, and the reasons are explained

If there is one seventh more male workers than female workers in a factory, male workers account for 1 + 1 / 7 = 8 / 7 of female workers
Take the number of female workers as 7, there are 8 male workers, and the number of the whole factory is 7 + 8 = 15
Therefore, the number of female workers accounts for 7 out of 15 in the whole factory
There are 28 female workers in a workshop, 21 less than male workers. How many times is the number of male workers? What is the proportion of male and female workers?
This is obviously a math problem, we primary school students can do
28/49=7/4,7/11.
There are 320 male workers and 180 female workers in a factory. How many times is the number of male workers? What is the percentage of female workers to male workers? How many more male workers than female workers? How many percent less female workers than male workers?
① 320 △ 180 = 179; answer: the number of male workers is 179 times of that of female workers. ② 180 △ 320 = 916; answer: the number of female workers is 916 of that of male workers. ③ (320-180) △ 180, = 140 △ 180, = 79; answer: the number of male workers is 79 times more than that of female workers. ④ (320-180) △ 320, = 140 △ 320, = 716; answer: the number of female workers is 716 less than that of male workers
A, B two cars at the same time from a, B two cities relative leave a, B two car speed ratio is 5:6, meet B car travel distance is a few times
The speed ratio of car a and car B is 5:6
When they met, the distance ratio of a and B was 5:6
When they meet, the distance of car B is 6 times that of car a
6：5
They travel the same time, s = vt
So the distance ratio is equal to the speed ratio
The speed ratio of car a and car B is 5:6
When they met, the distance ratio of a and B was 5:6
When they meet, the distance of car B is 6 times that of car a
6：5
They travel the same time, s = vt
So the distance ratio is equal to the speed ratio
The ratio of the original number of people in workshop a and workshop B is 4:3. After workshop a transfers 48 people to workshop B, the ratio of workshop a and workshop B is 2:3. How many people are there in the two workshops?
Let the number of people in workshop a be x and that in workshop B be y
x/y=4/3
(x-48)/(y+48)=2/3
x=160
y=120
Let the number of people in workshop a be x and that in workshop B be y
x/y=4/3
(x-48)/(y+48)=2/3
x=160
y=120
If the number of workshop a is 4x, the number of workshop B is 3x
4X-48 2
------ = ----
3X+48 3
The solution is x = 40
Then there are 40 * 4 = 160 people in workshop a and 40 * 3 = 120 people in workshop B
The scale is 1:6000000. On the map, the distance between the two places is 5cm. A and B cars are facing each other and meet in three hours. The speed ratio of a and B is 2:3. What's the speed of a and B?
5/（1/6000000）
=5*6000000
=30000000 (CM)
30000000 cm = 300 km
300 / 3 = 100 (km)
2+3=5
100*（2/5）
=100*0.4
=40 (km)
100*（3/5）
=100*0.6
=60 (km)
A: the speed of a is 40 km, and that of B is 60 km
The answer upstairs is wrong. The car travels 8 kilometers per hour. It's too slow
A 40 km / h
B 60 km / h
A 8, B 12
Given the distance of 300 km, divide 300 by 3 and multiply by two fifths to get the speed of A. Multiply by three fifths to get B's speed.
A 40 km / h
B 60 km / h
B 60 km / h
A 40 km / h
6000000cm=60km
Conversion unit
60*5/3=100(km)
After calculating the actual distance, find out how many kilometers the two cars travel per hour
100/(3+2)*3=60(km)
Calculate the speed of a by proportional distribution
100-60=40(km)
B's speed
The speed of the car is 90 km / h and that of the truck is 60 km / h. The truck leaves 5 hours ahead of time, and the car can catch up with the truck in a few hours
Train test
Ten hours later the car catches up with the truck!
Equation: 60 * 5 + 60x = 90x
If it takes 10 hours for car a to complete the whole journey, how many hours does it take for a car to complete the whole journey?
1 ÷（1/6 - 1/10）
=1 ÷1/15
=15 (hours)
1 (1 / 6-1 / 10) = 15 hours. In the analysis, the distance is regarded as' 1 ', 1 / 6 is the sum of the speeds of the two vehicles, minus 1 / 10 of the speed of vehicle a = 1 / 15 is the speed of vehicle B, and dividing by each other is the time of vehicle B for 15 hours
1÷（1／6－1／10）=15
Explanation: set the distance as unit 1
Then the speed of a is 1 / 10, because we meet in 6 hours, so the speed of a and B is 1 / 6 of mine
Subtract one sixth of a's speed from one tenth of B's speed
Divide the distance by the speed and you get time
1 / 15 = 15 hours
Let s be the whole journey, T1 for car a to complete the whole journey, T2 for car B to complete the whole journey
S / (s / T1 + S / T2) = 6, that is, (T1 * T2) / (T1 + T2) = 6
t1=10
The solution is T2 = 15 hours
If the whole journey is s and the speed of a is s / 10, we should first calculate the speed of B. dividing s by speed is time. B takes 6 hours to walk the distance of S / 10 times 4. Then his speed is 4S / 10 and then divided by 6. Then the total time is s divided by the speed of B, which is 15 hours
1、
1/6-1/10=4/60
1 △ 4 / 60 = 15 days
The ratio of people in workshop a and workshop B is 3:2. After 48 people from workshop a are transferred to workshop B, the ratio of people in workshop a and workshop B is 2:3. How many people are there in each workshop?
Suppose there were x people in workshop B. the meaning of the question is: (32x-48): (x + 48) = 2:3 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2 (x + 48) = 3 (32x-48) & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2x + 96 = 4.5x-144 & nbsp; & nbsp
On the map with a scale of 1:6000000, the distance between the two places is 5cm. The two cars run from each other at the same time, and they meet three hours later. It is known that the speed ratio of the two cars is 2:3. How many kilometers is the speed of the two cars?
5 △ 16000000 = 30000000 (CM) = 300 (km), 300 △ 3 = 100 (km), 100 × 22 + 3 = 40 (km), 100-40 = 60 (km); a: the speed of car a is 40 km / h, and that of car B is 60 km / h