The winner of the marathon at the 2004 Olympics in Athens was ________ with a time of 2 hrs 10 mins and 55 secs [2::10:55] The offical distance of the marathon is 42.195 KM. Estimate Baldinis average speed in KM per HR. Explain how you got the estimate.
The time was appr 2 hours and the distance was appr 40 km, for an average of appr 20 km/h
Rate = distance/time
To estimate Baldini's average speed in kilometers per hour (KM/hr), we can use the formula:
Average Speed = Distance / Time
We know from the question that the official distance of a marathon is 42.195 KM. We also have the time it took Baldini to complete the marathon, which is 2 hours, 10 minutes, and 55 seconds (2::10:55).
To convert the time from hours, minutes, and seconds to just hours, we need to convert the minutes and seconds to decimal hours. There are 60 minutes in an hour, so we divide the minutes by 60 and convert the seconds to decimal hours by dividing them by 3600 (60 minutes x 60 seconds).
Converting the time to decimal hours:
2 hours + (10 minutes / 60) hours + (55 seconds / 3600) hours
= 2 + (10/60) + (55/3600)
= 2 + 0.1667 + 0.0153
= 2.1820 hours (rounded to four decimal places)
Now, we can calculate the average speed:
Average Speed = Distance / Time
= 42.195 KM / 2.1820 hours
= 19.3269 KM/hr (rounded to four decimal places)
So, Baldini's estimated average speed in KM/hr is approximately 19.3269.