a. B is 1000 meters apart. A starts from a and B starts from B at the same time. A runs 150 meters per minute and B walks 150 meters per minute Line 60 meters, in 30 minutes, when a and B meet for the first time, is it the closest to a? What's the nearest distance? (take the whole number as the result)

a. B is 1000 meters apart. A starts from a and B starts from B at the same time. A runs 150 meters per minute and B walks 150 meters per minute Line 60 meters, in 30 minutes, when a and B meet for the first time, is it the closest to a? What's the nearest distance? (take the whole number as the result)

The speed sum of two people is 210 meters, the speed difference is 90 meters, 30 * 60 = 1800 meters in 30 minutes, 150 * 30 = 4500 meters in 30 minutes. The two people travel 6300 meters in total. It should be said that they can meet for four times at most, and haven't met for the fifth time in 30 minutes

The distance between a and B is 950 meters. A and B send out from a at the same time and go back and forth between a and B. A walks 40 meters per minute, B runs 150 meters per minute,
How many meters is the distance between a and B when they meet for the second time?

Time from B to B 950 △ 150 = 19 / 3 (min)
At this time, the distance between a and a is 40 × 19 / 3 = 760 / 3 (m)
The time for the two to meet each other is (950-760 / 3) / (40 + 150) = (2090 / 3) × (1 / 190) = 209 / 57 (minutes)
Distance from ground B (209 / 57) × 150 = 550m

A. B is 950 meters apart. A and B start from a at the same time and go back and forth between a and B. A walks 40 meters per minute and B runs 150 meters per minute. How many meters are there between a and B when they meet for the second time?

950 × 2 = 1900 (m) 1900 △ (40 + 150) = 10 (min) 10 × 2 = 20 (min) 20 × 40 = 800 (m) 950-800 = 150 (m) a: when a and B met for the second time, they were 150 meters away from B

The speed ratio of the two vehicles is two to three after two-thirds of an hour's journey from AB, which is 150 kilometers away
A and B cars every hour?

The speed sum of a and B is: 150 △ 2 / 3 = 225 km / h
The speed of a is 225 × 2 / (2 + 3) = 90 km / h
B's speed is 225 × 3 / (2 + 3) = 135 km / h
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