# SOLUTION: convert 250 kilometers per second to miles per hour.

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 Click here to see ALL problems on Unit Conversion Word Problems Question 176098: convert 250 kilometers per second to miles per hour.Answer by EMStelley(187)   (Show Source): You can put this solution on YOUR website!Note in this question that there are two things to convert: kilometers into miles, and seconds into hours. Let's deal with kilometers into miles first. We need to know how many miles are in a kilometer. This can be done with a simple web search: 0.621 miles is 1 kilometer. So 250 km/sec * 0.621 miles/km = 155.25 miles/sec (the km cancel out) Next, we need to convert from seconds into hours. Well, there are 60 sec in a minute and 60 minutes in an hour, so there are 60*60=360 sec/hr. Thus, 155.25 miles/sec * 360 sec/hr = 55890 miles/hr.