



 
Ho Cody, One kilometer is 1000 meters so \[\mbox{400 meters is } \frac{400}{1000} \mbox{ kilometers.}\] One hour is 60 minutes and one minute is 60 seconds so one hour is $60 \times 60$ seconds or \[\mbox{one second is} \frac{1}{60 \times 60} \mbox{ hours.}\] Hence the train travels \[\frac{400}{1000} \mbox{ kilometers in }30 \times \frac{1}{60 \times 60} \mbox{ hours.}\] How far does it travel in one hour? Penny  


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