Question

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

Answer 1

9

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