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A. The distance between B and a is 320 km. A and B cars leave a and B at the same time. They run in opposite directions and meet in two hours. It is known that the speed of a car is 7 / 9 of that of B car Formula, not equation
The sum of a and B speed is 320 △ 2 = 160 km / h
The speed of car B is 160 ÷ (1 + 7 / 9) = 90 km / h
The speed of car a is 160-90 = 70 km / h
A: the speed of car a is 70 km / h, and that of car B is 90 km / h
The distance between AB and a is 320 km. A and B vehicles respectively run from AB and B at the same time. They meet two hours later. It is known that the speed of car a is 7 / 9 of that of car B, and the speed of car a is 7 / 9 of that of car B
How many kilometers does car a travel per hour?
It's better to have an explanation if you have a formula
320÷2÷﹙1＋7／9﹚=90
90×7／9=70
Car a travels 70 kilometers per hour
A. B is 320 kilometers away from each other. Car a and car B are going from a and B at the same time. They meet two hours later. It is known that the speed ratio of car a and car B is 7:9. How many kilometers does car B travel per hour?
320 △ 2 × 97 + 9 = 160 × 916 = 90 (km) a: car B travels 90 km per hour
A. B is 320 kilometers away from each other. Car a and car B are going from a and B at the same time. They meet two hours later. It is known that the speed ratio of car a and car B is 7:9. How many kilometers does car B travel per hour?
320 △ 2 × 97 + 9 = 160 × 916 = 90 (km) a: car B travels 90 km per hour
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