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 48 kilometers per hour. At what speed, in kilometers per hour, is the car traveling?	Choices
A) 39	B) 40	C) 41	D) 42	E) 43
48 * T = 1 km =&gt; T = 1/48 km/h   V*(T+15/3600) = 1   V (1/48 + 15/3600) = 1   V (90/3600) = 1   V = 40 km/h   The answer is 40.
<result>B</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 48 kilometers per hour. At what speed, in kilometers per hour, is the car traveling?