3 way application T 20, how to write 3 way application has a process

1 4*4*sqm) (2+1)*(2+1)*m²) (sqm).

2 3*3* square meters).

1 Method: Use the area of the outer circle (radius is 3) and subtract the area of the inner circle (radius 2) to get the area of the road.

s=2.Method: When the cow is 3 meters away from the tree, it is the farthest grass it can eat, and 3 meters away from the tree should be a circle with a radius of 3, so the area of grass that can be eaten should be the area of the circle.

s=3.The wheel rolls one circle and drives forward a distance of one circle with the circumference of that far, that is, 1 minute 100 circles, a total of 10 minutes, so the distance is.

l=10*100*km.

How many square meters is the area of a 1-meter-wide path around a circular flower bed with a radius of 2 meters?

2+1) -2 =5 sq.m.).

There is a cow tied under the tree, and the rope that ties the cow is 3 meters long, (excluding the joints).Calves can graze around tree trunks, do you know how many square meters the calf's maximum range of movement is?

3 = 9 square meters).

Wang Qiang's bicycle tires have an outer diameter of about 70cm, an average of 100 weeks per minute, and it takes him about 10 minutes to ride from home to school, how far away he is from school.

100*10*70 100000=700 km).

Ideas point out: 1. Let the fraction of this year be b a, list two equations according to the topic, and find a and b.

2. Let Xiao Ming's ball be x, and Xiao Liang's y is y, list two equations and solve them.

3. The set is completed three days in advance, and x people are required.

List the equation according to the title:

40×15=（15-3）x

Solve x.

1. Let the numerator of the ruler be a and the denominator be the collapse b

then (a+3) b=5 6 ; a-3) b=1 3 to get the system of equations 6(a+3)=5b ; 3(a-3)=b gives a=7 b=12 and the number of finches is 7 12

The greatest common factor is 8, so the longest side length is 8cm

Solution: The working efficiency of A is x, B's is y, and Brother C's is z, then there is:

6x+6y=1/3

2y+2z=1/4(1-1/3)

5x+5y+5z=1-1 3-1 4(1-1 3) The solution is: x=3 180

y=7/180

z=8/180

A should be rough with: 1800x(6+5)3 180=330B: 1800x(6+5+2)7 180=910C: 1800x(2+5)8 180=560

There are 3,000 bottles of iced green tea, and the new orange juice is 25% more than the iced green tea, how many bottles of new orange juice are there?

Fresh orange juice = 3000 (1+bottle;

The school-run factory's income this month is 30,000 yuan, and there is still 28,500 yuan left after paying taxes. Do you know what the tax rate is for school-run factories?

Tax rate = (30000-28500) 30000 100 =5 ;

Uncle Li will get a lump sum deposit of 50,000 yuan for 2 years, calculated at an annual interest rate, how much interest does Uncle Li get after maturity?

Balance of interest = 50,000 2 yuan.