How high can I pile all the students' homework together? Tell me how you estimate it.

There are 2800 students in the experimental primary school in this city.

(1) If an average person saves pocket money every day in 0.5 yuan, the money saved in 360 days will be used to help out-of-school children in underdeveloped areas in Africa, and each out-of-school child needs about 200 yuan in terms of annual tuition fees. How many children in this area can get a chance to go to school with this money?

2800*0.5*360/200=2520

2. If each person consumes 3 disposable plastic cups every day, the price of each plastic cup is 0. 1 yuan. How much does the whole school spend on plastic cups every year?

2800*3*0. 1=840 yuan.

3. If the students in this school use 20 exercise books every year, and each exercise book has 20 pages, how many pages do all the students use each year?

2800 * 20 * 20 =1120000 pages

4. If all the students' work towers are put together, how high can they be stacked? Tell me how you estimate it.

1 120000/ 160 = 7000cm = 70m

Stamp the notebook to the height of 1cm, and then count the number of notebooks. About 8 notebooks are 1cm, so the total number of 8 notebooks is 160 pages. Take the total number of pages/160.