A car traveling at a certain constant speed takes 20 seconds longer to travel 1 kilometer than it would take to travel 1 kilometer at 36 kilometers per hour. At what speed, in kilometers per hour, is the car traveling? Select the correct option
A) 24  B) 26  C) 28  D) 30  E) 32
36 * T = 1 km =&gt; T = 1/36 km/h   V*(T+20/3600) = 1   V (1/36 + 20/3600) = 1   V (120/3600) = 1   V = 30 km/h   The answer is 30.
<result>D</result>
A car traveling at a certain constant speed takes 20 seconds longer to travel 1 kilometer than it would take to travel 1 kilometer at 36 kilometers per hour. At what speed, in kilometers per hour, is the car traveling?