Urgent. It must be done today Figure 8 shows the charging standard of a highway toll station for passing vehicles. (large vehicle 30 yuan / vehicle, medium vehicle 15 yuan / vehicle, small vehicle 10 yuan / vehicle) one day, the ratio of the number of large vehicles and medium vehicles passing through the toll station is 5:6, the ratio of the number of medium vehicles and small vehicles is 4:11, and the total toll of small vehicles is 270 yuan more than that of large vehicles (1) How many large cars, medium cars and small cars will pass through the toll station on this day? (2) How much is the total charge for this day? Party A and Party B worked together to clear the snow on the 400 meter circular runway. They both cleaned the snow from the same place. At first, party a cleaned the snow one third faster than Party B. later, Party B used 10 minutes to adjust the tools and went back to clean it, but the work efficiency was twice as high as before, How many minutes did B work after changing tools? We need a formula

Urgent. It must be done today Figure 8 shows the charging standard of a highway toll station for passing vehicles. (large vehicle 30 yuan / vehicle, medium vehicle 15 yuan / vehicle, small vehicle 10 yuan / vehicle) one day, the ratio of the number of large vehicles and medium vehicles passing through the toll station is 5:6, the ratio of the number of medium vehicles and small vehicles is 4:11, and the total toll of small vehicles is 270 yuan more than that of large vehicles (1) How many large cars, medium cars and small cars will pass through the toll station on this day? (2) How much is the total charge for this day? Party A and Party B worked together to clear the snow on the 400 meter circular runway. They both cleaned the snow from the same place. At first, party a cleaned the snow one third faster than Party B. later, Party B used 10 minutes to adjust the tools and went back to clean it, but the work efficiency was twice as high as before, How many minutes did B work after changing tools? We need a formula

Question 1: the ratio of the number of large cars, medium cars and small cars is 4 * 5:4 * 6:11 * 6 = 10:12:33. If the number of large cars, medium cars and small cars is 10x, 12x and 33x respectively, then: 33x * ` 10 - 10x * 30 = 270330x - 300X = 270x = 9. So: large cars: 10x = 90, medium cars: 12x = 108, small cars: 33x