Jeremy challenges his friends Asafa, Yohan, Nestor and Usain to a 400 metre race, with a difference. Jeremy will run the entire 400 metres and the others will run 100 metres each and then combine their times. If their combined time is quicker than Jeremy's they will have won the race. Asafa runs his stage in 10 seconds, Yohan runs his stage in 11 seconds but Nestor trips over and runs his stage in 16 seconds. Jeremy has run the first 300 metres at an average speed of 10.5 seconds per 100 metres. However when Jeremy runs 400 metre races, his final 100 metres is always 1.5 seconds slower than his average speed over the first 300 metres. If Usain's team is to have a chance of winning how quickly must he run his 100 metres?	Choose the correct choice from the following options.
A) 5
B) 5.5
C) 6
D) 6.5
E) 7
Jeremy has run the first 300 metres at an average speed of 10.5 seconds per 100 metres and so his time for 300 metres is 31.5 seconds (10.5 x 3 = 31.5).   Jeremy's final 100 metres is always 1.5 seconds slower than his average 300 metre speed and so he will run it in 12 seconds (10.5 + 1.5 = 12).   Jeremy's total time for 400 metres is 43.5 seconds (31.5 + 12 = 43.5).   Usain's team has run the first 300 metres in 37 seconds (10 + 11 + 16 = 37).   To be in with a chance of winning Usain must close the gap of 6.5 seconds (43.5 - 37 = 6.5).   ANSWER: 6.5
<result>D</result>
Jeremy challenges his friends Asafa, Yohan, Nestor and Usain to a 400 metre race, with a difference. Jeremy will run the entire 400 metres and the others will run 100 metres each and then combine their times. If their combined time is quicker than Jeremy's they will have won the race. Asafa runs his stage in 10 seconds, Yohan runs his stage in 11 seconds but Nestor trips over and runs his stage in 16 seconds. Jeremy has run the first 300 metres at an average speed of 10.5 seconds per 100 metres. However when Jeremy runs 400 metre races, his final 100 metres is always 1.5 seconds slower than his average speed over the first 300 metres. If Usain's team is to have a chance of winning how quickly must he run his 100 metres?