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The number of female workers in a workshop accounts for 3 / 8, and then four female workers are recruited. At this time, the number of female workers accounts for 4 / 9 of the total number of workers. There are () workers in this workshop
There are x workers
(3/8)x+4=(4/9)(x+4)
(3/8)x+4=(4/9)x+16/9
(4/9)x-(3/8)x=4-16/9
(5/72)x=20/9
x=32
Therefore, there are (36) workers in this workshop
The number of women workers in the textile factory accounted for 58% of the total number. Later, 30 women workers were transferred in. At this time, the number of women workers was twice that of men workers. How many workers are there in the whole factory now?
Male workers: 30 ^ [2-58 ^ (1-58)], = 30 ^ [2-58 ^ [38], = 30 ^ [2-53], = 30 ^ [13, = 90 (people); now there are 90 × 2 + 90 = 180 + 90, = 270 (people); answer: there are 270 people in the whole factory
There are 120 male workers in a factory, 20% more than female workers. How many people are there in this factory
Set female workers as X persons
X×（1+20％）=120
X=100
100 + 120 = 220 people
The speed ratio of a and B is 7:8. When they meet, a is 10 kilometers away from the destination. How many kilometers is the distance between AB and B?
If Party A and Party B set out at the same time and experience the same time when they meet, it can be set that Party A and Party B meet after x time, and the distance between AB and ab is y km
The linear equation of two variables can be obtained
7x+8x=y
y-7x=10
The solution is y = 1.75
The goods transported by car a and car B are 10.5 tons in total. The goods transported by car a are 0.5 tons less than that transported by car B twice. How many tons of goods are transported by car a and car B respectively?
10.5 + 0.5 = 11 (ton)
11 / (2 + 1) = 11 / 3 (ton) a
10.5-11 / 3 = 41 / 6 (ton) B
Let party a transport x tons and Party B transport y tons. that
x+y=10.5
x=2y-0.5
The simultaneous equations are solved
x=41/6
y=11/3
Let a be x and B be y, then x + y = 10.5. X=2Y-0.5。 In this way, x = 41 / 6, y = 11 / 3. The unit is still ton!!
2. Party A and Party B jointly transport 10.5 tons of goods, and the goods transported by Party A are two times less than those transported by Party B by 1 / 2 ton. How many tons of goods are transported by Party A and Party B respectively?
10.5-1 / 2 = 10 tons
10 / (1 + 2) = 3 and 1 / 3
Let party a transport x tons and Party B transport y tons
Column equation:
X+Y=10.5
2Y+Y-0.5=10.5
The solution is: x = 41 / 6
Y=11/3
How many hours does it take for car a to complete the whole journey? When car a meets car B, car a travels 25 kilometers more than car B. how many kilometers is the distance between car a and car B?
B and ab leave each other at the same time. After 5 hours' meeting, a takes 8 hours to complete the journey. How many hours does it take for B to travel? When a meets B, a travels 25 kilometers more than B. how many kilometers is the distance between B and a?
How many kilometers are there between a and B?
Less.
8x = z
5x+5y = z
5x-5y=25
10x=25+z
2x = 25
x = 12.5
z = 100
y = 7.5
100/7.5 = 13.33333333333
Party A and Party B meet for 100 kilometers
It takes 13 hours and 20 minutes for B to complete the journey
Let x = the speed of a, y = the speed of B, z = the whole distance
8x = z
5x+5y = z
5x-5y=25
10x=25+z
2x = 25
x = 12.5
z = 100
y = 7.5
100/7.5 = 13.33333333333
Party A and Party B meet for 100 kilometers
It takes 13 hours and 20 minutes for B to complete the journey
The speed ratio of a and B is 7 to 8
Then the distance ratio between a and B is 7 to 8
Then car B travels 40 * 2 = 80 km more than car a
Then the distance between AB and ab: 80 / (8 / 15-7 / 15) = 1200 km
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There are 180 workers in workshop a and workshop B. If one fifth of the number of workers in workshop B is transferred to workshop a, the number of workers in workshop a is just twice that of workshop B. how many workers are there in workshop a and workshop B?
180÷﹙1＋2﹚＝60
60÷﹙1－1／5﹚＝75
180－75=105
There were 105 people in workshop a and 75 people in workshop B
180÷﹙1＋2﹚＝60
60 (1-1 / 5) = 75 (person)
180－75=105
There were 105 people in workshop a and 75 people in workshop B
A 105 B 75
180÷﹙1＋2﹚＝60
60÷﹙1－1／5﹚＝75
180－75=105
There were 105 people in workshop a and 75 people in workshop B
Hee hee hee hee hee hee hee hee
It takes 20 minutes for car a to go from place a to place B, and it takes 5 minutes for car B to go from place B to place A. now the two cars start at the same time. When they meet, car B travels 3 kilometers more than car a,
a. B how many kilometers are there between the two places?
Let the distance between a and B be X. A, and the travel time of B be t
xt/20+xt/5=x
T = 4
xt/5-xt/20=3
x=5km
Party A and Party B transport a total of 108 tons of goods. If Party A transports 17 tons of the task to Party B, then the ratio of Party A's transportation task to Party B's transportation task is 5:4. How many tons of the original transportation task is assigned by Party A?
5 + 4 = 9, a later: 108 × 59 = 60 (tons), a original: 60 ^ (1-17), = 60 ^ (67), = 60 × 76, = 70 (tons); answer: a original assignment of transport task is 70 tons
It takes 3 hours for car a to complete the whole journey, and 4 hours for car B to complete the whole journey. The distance between the two cars is 10 kilometers
How many meters are there between a and B?
The two cars met at a distance of 10km from the midpoint
A. B distance between two places: (10 + 10) / (4-3) x (4 + 3) = 140 (km) = 140000 (m)
Speed ratio 3 / 4 = 4:3
2 * 10 / (4 / 7-3 / 7) = 140 km
10×2÷【1÷（1/3 +1/4）】÷（1/3-1/4）
=20÷12/7÷1/12
=140 km
Speed: 1 / 3
Speed B: 1 / 4
A is faster than B: 1 / 3-1 / 4 = 1 / 12
Whole course: (10 + 10) / (1 / 12) = 240
RELATED INFORMATIONS
- 1. There are 120 workers in a factory. The female workers are three fifths of the male workers. How many are the male workers?
- 2. There were 240 workers in a factory, of which women accounted for two fifths. Later, some women workers came in, so that the number of women workers accounted for three fifths of the total number, How many female workers are transferred in?
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