The distance between the two places is 100 km. The two cars run from the two places at the same time. They meet in four fifths of an hour. The speed ratio of the two cars is 3:2. Does car a travel every hour? The second car runs? Km per hour

The distance between the two places is 100 km. The two cars run from the two places at the same time. They meet in four fifths of an hour. The speed ratio of the two cars is 3:2. Does car a travel every hour? The second car runs? Km per hour

100 / 4 / 5 = 125
3+2=5
125/5=25
3 * 25 = 75 (km)
2 * 25 = 50 (km)

It is known that the speed ratio of car a and car B is 5:4, and car a travels 100 kilometers per hour. What is the distance between the two places?

Vehicle B: 100 * 4 △ 5 = 80 per hour
(100 + 80) * 6 = 180 * 6 = 1080km

【1】 What is the quotient of the difference between one and four fifths divided by the sum of two fifths and one fourth?
【2】 The two trains leave from the two places at the same time. Car a travels 50 kilometers per hour and car B 70 kilometers per hour. After three-quarters of an hour, the two trains meet. How many kilometers are there between the two places?

(1) Quotient = (1-4 / 5) / (2 / 5 + 1 / 4) = 4 / 13
(2) Distance = (50 + 70) (3 / 4) = 90 km