Question

Refer to this table of results of the Indianapolis 500 in which drivers competed in the 500-mile race. To the nearest mile per hour, how much faster was the average winning speed in 2004 than in 1911?

Answer 1

Winning speed in 2004 = 500/(3 + 15/(60 * 60)) = 500/3.004 = 166.4 miles/hour
Winning speed in 1911 = 500/(6 + 42/60) = 500/6.7 = 74.63 miles/hour

The average winning speed in 2004 was (166.4 - 74.63) = 92 miles per hour faster than in 1911.