During a recent Formula 1 race meeting, Sterling managed to complete a lap with an average speed of 150 mph. He managed to complete the first two fifths of the lap length at a speed of 123 mph and the second two fifths of the lap length at a speed of 164 mph. At what speed was the final one fifth of the lap length covered - the answer is not 176 mph?
[Ref: ZTXP] © Kevin Stone
Printed from BrainBashers [www.brainbashers.com]