In a factory, female workers account for 1 / 5 of the total number of workers, and then 20 female workers are transferred. At this time, female workers are 1 / 2 of the number of male workers. How many workers are there in the factory?

In a factory, female workers account for 1 / 5 of the total number of workers, and then 20 female workers are transferred. At this time, female workers are 1 / 2 of the number of male workers. How many workers are there in the factory?

20÷【1/2-1/（5-1）】×（1+1/2）
=20÷【1/2-1/4】×1.5
=20÷1/4×1.5
=80×1.5
=120
In a factory, female workers account for 15% of the total number of workers, and then 20 female workers are transferred. At this time, female workers are 12% of the number of male workers. How many workers are there in the factory?
Male workers: 20 ^ [12-15 ^ (1 − 15)] = 20 ^ [12-14], = 20 × 4, = 80 people; the existing factory: 80 + 80 × 12, = 80 + 40, = 120 (people) a: the factory now has 120 workers
The number of female workers in a factory accounts for 3 / 4 of the total number of workers in the factory. If the number of male and female workers increases by 60, then the ratio of female workers to the total number of workers in the factory is 2:3. How many people did the factory have?
There are x employees in the original factory
3/4X+60=2/3（X+60+60）
3/4X+60=2/3（X+120）
3/4X=2/3X+20
1/12X=20
X=240
There are 240 people in this factory
Two hundred and forty
Suppose there are x workers in the original factory
[(3/4)*x+60]：(x+60+60)=2：3
The solution of the equation is: x = 240
A: it's a long time ago. A: you're welcome
In a factory, there are 27 people in workshop a and 19 people in workshop B. if 20 people go to two workshops, so that the number of people in workshop a is twice that of workshop B, how many people should be transferred to workshop a and workshop B?
Let's move to a and get x people
According to the meaning of the title:
27+x=2(19+20-x)
3x=51
x=17
So 17 people were transferred to a, 20 - 17 = 3 people were transferred to B
On the map with a scale of 1:6000000, the distance between a and B is 5cm. A and B cars run from a and B at the same time,
Three hours later, the two cars meet. It is known that the speed ratio of car a to car B is 2:3. How many kilometers do the two cars travel per hour?
The actual distance is: 6000000 × 5 △ 100000 = 300km
So the speed of car a is: 300 △ 3 × 2 / (2 + 3) = 40 km / h
The speed of car B is: 300 △ 3 × 3 / (2 + 3) = 60 km / h
Hello:
Distance between the two places: 5 * 6000000 = 30000000 cm = 300km
Speed and speed: 300 / 3 = 100 km
B car per hour: 100 / (3 + 2) * 3 = 60 km
Car a per hour: 100-60 = 40 km
The speed of a car is 80km per hour, the speed of a truck is 4 / 5 of that of a car, and the speed of a truck is 3 / 4 of that of a car. How many kilometers does the truck travel?
The speed of the truck per hour is 80 × 4 / 5 = 64
The truck traveled 64 × 3 / 4 = 48 km
Hope to help you, if you have any questions, you can ask~~~
I wish you progress in your studies and make progress! (*^__ ^ *
Truck speed per hour:
80 × 4 / 5 = 64 (km / h)
The truck is moving:
64 × 3 / 4 = 48 (km)
A: the truck has traveled 48 kilometers.
Trucks travel 45 kilometers per hour, and cars travel 1.4 times as fast as trucks. They start from two places 162 kilometers apart at the same time and face each other. If they start at 8:15, when do they meet?
162 △ (45 + 45 × 1.4), = 162 ^ (45 + 63), = 162 ^ 108, = 1.5, 1.5 = 1:30, 8:15 + 1:30 = 9:45, a: it's 9:45 when we meet
The original number of people in workshop a and workshop B was equal. Due to work needs, 24 people were transferred from workshop a to workshop B. at this time, the number of people in workshop a was 1 / 4 of that in workshop B
How many people are there
If there were x people in each workshop, then
(x-24):(x+24)=1:4
4(x-24)=(x+24)
x=40
B now has: 24 × 2 (1-1 / 4) = 64 people
There were 64-24 = 40 people in each group
（24+24×1/4）÷（1-1/4）
=30÷3/4
=40 people
Suppose there are x people in the original workshop a
x-24=1/4*(x+24)
The solution of the equation is: x = 40
The number of people in workshop B = the number of people in workshop a = 40
A: the original number of people in workshop a is 40, while that in workshop B is 40.
(x-24)/4=x+24
3x=120
x=40
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
When a and B start from AB, the speed of a and B is 20% lower than that of a after meeting at 5:4. When a and B arrive at B, B is 15 kilometers away from a
Big brothers and sisters are in a hurry!
If the speed ratio of a and B is 5:4, then the distance ratio of a and B is 5:4, that is to say, 5 / 9 of the whole distance from a and 4 / 9 of the whole distance from B
After meeting, the speed of a decreases by 20%. At this time, a and B are at the same speed. When a arrives at B, it means that a has walked 4 / 9 of the whole journey, and B should also walk 4 / 9 of the whole journey. At this time, B is 1 / 9 of the whole journey from a
AB distance = 15 × 9 = 135 km
1 * 4 equals 1 / 4 1 * 5 equals 1 / 5 5:4 equals 4:5 (* is divided by)
4 + 5 equals 9
5 divided by 9 is 5 / 9
4 * 9 equals 4 / 9
5 / 9-4 / 9 equals 1 / 9
15 * 1 / 9 equals 135km
AB distance = 15 × 9 = 135 km