The plane of agricultural aviation in 4 hours flew by 960 km. For the same distance the passenger plane what is the time will fly by if its speed is 80 km/h more?

1) 960:4=240 km/h speed of the agricultural plane; 2) 240+80 = 320 km/h speed of the passenger plane; 3) 960:320=3 h; Answer: in 3 hours the passenger plane the same distance will fly by
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