400 kph = 248.5 mph
Multiply km/hr by 0.62137 mi/km to get miles per hour: 263* 0.62137 = 163.420 mph (the rough conversion is 5/8 miles per km, or 8/5 km per mile)
It depends on your weight This site may help you answer your question http://www.kuci.uci.edu/show_feature.cgi?id=835
$40,000 per year (working 40 hours per week, full-time) is $19.23 per hour.
About $28.85/hour, assuming that you work 40 hours per week and that there are 52 weeks in a year.28.85 X 40 X 52 = 60,000