Find the formula and answer of two practical problems 1. Someone rode a bicycle from place a to place B for 3km in the first 0.2 hours, and then for 18 minutes at the speed of 0.3km per minute for the rest of the journey. What is the average speed of this person from place a to place B per hour? 2. Someone has invested 65000 yuan to buy some kind of fund. It is known that this kind of fund is expected to increase by 10% every year. Please calculate the total value of the fund held by this person in three years?

Find the formula and answer of two practical problems 1. Someone rode a bicycle from place a to place B for 3km in the first 0.2 hours, and then for 18 minutes at the speed of 0.3km per minute for the rest of the journey. What is the average speed of this person from place a to place B per hour? 2. Someone has invested 65000 yuan to buy some kind of fund. It is known that this kind of fund is expected to increase by 10% every year. Please calculate the total value of the fund held by this person in three years?

The average speed is the total distance divided by the total time
The total distance is: 3 + 0.3x18 = 8.4km
The total time is 0.2 hours + 18 minutes = 0.2 hours + 0.3 hours = 0.5 hours
8.4 △ 0.5 = 16.8km/h
The average speed is 16.8 kilometers per hour
2. Increase by 10% every year and 3 (1 + 10%) in three years, that is
65000x (1 + 10%), # 179; = 65000x1.331 = 86515 yuan
Three years later, the total value of the fund is expected to reach 86515 yuan

Calculation problem, solution idea, formula!
2 / 3kg of a certain pesticide diluted with water can be sprayed on 7 / 8 hectares of vegetable land. How many hectares of vegetable land can be sprayed on 1kg of such pesticide?

Pesticide: Vegetable Land = 2 / 3:7 / 8 = (2 / 3 * 24): (7 / 8 * 24) = 16:21 = (16 / 16): (21 / 16) = 1:21 / 16 A: 1kg of this pesticide can be sprayed on 21 / 16 hectares of vegetable land!