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Questions and answers by
dushyant kaushik
Answers (1)
average speed = total distance travelled\total time 60km\hr = 30km +90km\x km. x +1hr =120km \60 x =2-1 =2 answere -the train must travel the next 90 km with a speed of 90 km/h so that the averange speed is 60 km/h.
