Mathematical problems of civil servants' performance test - Training Enrollment Network

Mathematical problems of civil servants' performance test

Let the speed of A be x m/min, then the speed of B is 2x/3m/ min.

Solution (x+2x/3)*(5/4+ 15/4)=600.

Get x=72.

600÷(72+72*2/3)=5

Let the velocity of c be y,

(72+y)*(5+5/4)=600

y=24

choose one

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