I had the following question in a exam a couple of days ago and I couldn't solve it, but I know I had to use a Quadratic Equation (ax²+bx+c). Still I didn't came up with a formula....
A journey from A to B is 550km. In my steady little car that travels at a nice sedate speed I get there in a reasonable time. However if I hired something more up market that travels on average 6km/hr faster (still keeping under the speed limit of course), I can get to B 50 minutes sooner.
Determine the average speed of my steady little car, and how long I will take to get to B.
Thank you for your help