Eight fifths of the cement sales of plant a is exactly three fifths of that of plant B. the sales of plant B is 1.2 million tons. How many million tons of cement are sold by plant a and plant B? Everyone help, there are reward points ~!

Eight fifths of the cement sales of plant a is exactly three fifths of that of plant B. the sales of plant B is 1.2 million tons. How many million tons of cement are sold by plant a and plant B? Everyone help, there are reward points ~!

120×0.6=72
72×0.625=45
120+45=165

B runs 120 meters per minute on average. A's speed is 1.5 times that of B. A is 100 meters in front of B. how many minutes later can a catch up with B

Five minutes

As shown in the figure, a and B practice running on the circular track. It is known that a circle of the circular track is 400 meters long, and B runs 6 meters per second. A's speed is 43 times faster than B's. (1) if a and B start in the opposite direction at the same time at a distance of 8 meters on the track, how many seconds will it take for them to meet for the first time? (2) If a starts in the same direction 8 meters in front of B, how many seconds will it take for them to meet for the first time?

(1) Let a and B meet for the first time in x seconds, then 6 × 43x + 6x = 400-8, and the solution is x = 28. A: after 28 seconds, a and B meet for the first time. (2) let a and B meet for the first time in Y seconds, then 6 × 43y = 6y + 400-8, and the solution is y = 196. A: after 196 seconds, a and B meet for the first time