A car traveling at a certain constant speed takes 5 seconds longer to travel 1 km than it would take to travel 1 km at 75 km/hour. At what speed, in km/hr, is the car traveling?	Choose the correct choice from the following
A) 70
B) 72
C) 74
D) 75
E) 78
Time to cover 1 kilometer at 80 kilometers per hour is 1/75 hours = 3,600/75 seconds = 48 seconds;   Time to cover 1 kilometer at regular speed is  48 + 5= 
<gadget id="calculator"> 48 + 5</gadget>
<output>53</output>
53 seconds= 53/3,600 hours = 1/70 hours;   So, we get that to cover 1 kilometer 1/70 hours is needed --&gt; regular speed 70 kilometers per hour (rate is a reciprocal of time or rate=distance/time).   70nswer: 70
<result>A</result>
A car traveling at a certain constant speed takes 5 seconds longer to travel 1 km than it would take to travel 1 km at 75 km/hour. At what speed, in km/hr, is the car traveling?