tammydebes tammydebes

30-07-2020
Mathematics

contestada

A train travels 60km in y minutes.If this average speed is 400km per hour,find the value of y

Respuesta :

mhanifa mhanifa

30-07-2020

Answer:

9

Step-by-step explanation:

Speed of the train is:

60 km / y min

And average speed is:

400 km / h = replacing 1 h with 60 min
400 km/ 60 min = 20 km /3 min = 60 km / 9 min

Comparing the two above, we see y= 9

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