In the 2004 Summer Olympics, Marie Helene Premont won the silver medal in the women's mountain bike race. She completed the 31.3
km course in 1 h 57 min 50 s. a) Determine her average speed in kilometres per hour.
b) At this rate, how long would she take to complete a course of 45 km? Express your answer in hours, minutes, and seconds.
PLEASE SHOW THE STEPS.
I think A. convert the time to seconds, so all the time are 7070sec and the total course to meter. so 31300meter Vector = TotalCourse÷total time V=31300/7070=4.427157m/s convert it to km/h so 4.427157×36÷10= 15.9377km/h B. 45÷15.9377=2.823Hour it means that around 2 Hour 48Minutes more. i think the teacher need to simplify it
225 (since the fraction is over 180° (because 5Π/4 > Π we know that the answer must be bigger than 180° (because 180° = Π (radians) and its less than 270° because 270° = 3Π/2 or 6π/4
