1. A batch of "influenza A (H1N1)" drugs are transported by large and small trucks at the same time, which can be completed in 6 hours. If they are transported by large trucks alone, they can be completed in 10 hours. If they are transported by small trucks alone, how many hours will it take? 2. If you buy a car by installment, you need to increase the price by 7%. If you buy it by cash, you can enjoy a "95% discount". Uncle Wang calculated it and found that the installment is 7200 yuan more than the cash purchase. Do you know the original price of the two cars? 3. The inner diameter of the water pipe is 2cm, and the flow rate of water in the pipe is 8cm per second? You don't have to answer the second question.

1. A batch of "influenza A (H1N1)" drugs are transported by large and small trucks at the same time, which can be completed in 6 hours. If they are transported by large trucks alone, they can be completed in 10 hours. If they are transported by small trucks alone, how many hours will it take? 2. If you buy a car by installment, you need to increase the price by 7%. If you buy it by cash, you can enjoy a "95% discount". Uncle Wang calculated it and found that the installment is 7200 yuan more than the cash purchase. Do you know the original price of the two cars? 3. The inner diameter of the water pipe is 2cm, and the flow rate of water in the pipe is 8cm per second? You don't have to answer the second question.

one
1 ÷ (1 / 6-1 / 10) = 15 hours
three
Inner radius 2 △ 2 = 1cm
Cross sectional area:
3.14 × 1 × 1 = 3.14 square centimeter
5 minutes wasted:
3.14 × 8 × 60 × 5 = 7536 CC = 7.536 L