A car traveling at a certain constant speed takes 15 seconds longer to travel 1 kilometer than it would take to travel 1 kilometer at 60 kilometers per hour. At what speed, in kilometers per hour, is the car traveling?
Select:
A) 48  B) 50  C) 52  D) 54  E) 56
60 * T = 1 km =&gt; T = 1/60 km/h   V*(T+15/3600) = 1   V (1/60 + 15/3600) = 1   V (75/3600) = 1   V = 48 km/h   The answer is 48.
<result>A</result>
A car traveling at a certain constant speed takes 15 seconds longer to travel 1 kilometer than it would take to travel 1 kilometer at 60 kilometers per hour. At what speed, in kilometers per hour, is the car traveling?