Question 351797
Throughout the problem, {{{r=60}}}


Use {{{d=rt}}} to get


a) 5 mins: 


5 minutes = {{{5/60=1/12}}} hours



So {{{t=1/12}}}



{{{d=rt}}} 


{{{d=60(1/12)=5}}}



So the train travels 5 km in 5 minutes


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b) 10 mins: 


10 minutes = {{{10/60=1/6}}} hours



So {{{t=1/6}}}




{{{d=rt}}} 


{{{d=60(1/6)=10}}}



So the train travels 10 km in 10 minutes


Starting to see a pattern?


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a) 20 mins: 


20 minutes = {{{20/60=1/3}}} hours


So {{{t=1/3}}}




{{{d=rt}}} 


{{{d=60(1/3)=20}}}



So the train travels 20 km in 20 minutes



Note: If a train is traveling 60 kph, then in 'x' minutes it has traveled 'x' kilometers.