1. In the first year, Team A and Team B * * produced 65438+ ten thousand Jin of rice. In the second year, Team A increased production by 10% and Team B increased production by 15%. The total output of the two teams increased by 12% compared with the first year. How many Jin of rice did each team produce in the second year?

Solution: Let's assume that in the first year A produced X kilograms of rice. In the first year, B produced 10-x ten thousand Jin of rice.

x( 1+ 10%)+( 10-x)( 1+ 15%)= 10x( 1+ 12%)

1. 1x+ 1 1.5- 1. 15x = 1 1.2

0.05x=0.3

x=6

The yield of rice in the first year B: 10-6=4 (ten thousand Jin)

Rice yield in the second year: 6x( 1+ 10%)=6.6 (ten thousand Jin).

Rice yield in the second year: 4x( 1+ 15%)=4.6 (ten thousand Jin).

2. A school originally planned to donate 3000 books to schools in Sichuan disaster area, and the students responded well. Results 3780 books were actually donated, including 20% for junior high school and 30% for senior high school. How many books were originally planned to donate to junior high school and senior high school?

Xiegao Middle School originally planned to send X books, and junior high school originally planned to send 3000-x books.

(3000-x)( 1+20%)+x( 1+30%)= 3780

3600- 1.2x+ 1.3x = 3780

0. 1x= 180

x= 1800

Junior high school originally planned to give 3000- 1800= 1200 books.