Harvest 1 ",the average yield per mu of rape is 2400 kg, and the oil content is 40%. The average yield per mu of Fengshou No.2 rape was 1 300 kg higher and its oil content was 10 percentage point higher. A village planted 1 rape last year and 2% rape this year. Although the planting area decreased by 3 square meters compared with last year, the total oil production of rapeseed increased by 3750 kg compared with last year. How many hectares of rape were planted in this village last year and this year?

Solution: Suppose a hectare was planted last year and a-3 hectares were planted this year.

According to the meaning of the question

2400 a×40%+3750 =(2400+300)×(a-3)×(40%+ 10%)

960a+3750= 1350a-4050

1350a-960a=4050+3750

390a=7800

a=20

Last year, 20 hectares were planted, and this year, 20-3= 17 hectares were planted.