Posted on by seth mipworth

A train at a speed of 50 km h-¹ for 30 minutes , 40 kmh-¹ for the

A train at a speed of 50 km h-¹ for 30 minutes , 40 kmh-¹ for the next 15 minutes and then 60 kmh-¹ for the next 60minutes. Calculate the average speed of the car

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