
David W. answered 05/05/16
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This is a type of D-I-R-T (Distance-Is-Rate-times-Time) problem. D=RT
This problem asks you to determine time ("how long?"). Solving for T:
T = D/R
T = (5000 m) / (200 m/s) [put values in equation]
T = (5000 m) * [(1 sec)/(200 m)] [to divide by fraction, invert and multiply]
T = (5000/200) sec [note: m cancels]
T = 25 sec