Question

On a 100 kilometre track A train travels the first 30 km at a uniform speed of 30 km per hour. how

much fast must the train travel the next 70 kilometre so as to average 40 kilometre per hour for the

entire trip?​

Answer 1

Distance covered is 30km . Therefore Train must travel at a average speed of 46.66 km/ h to cover 70km.