suppose a runner completes a 10k (10.0km) road.race in 43 minutes and 55 seconds what is the runners average speed in miles per hour
10 km = 6.21371 mi
53 sec = 53/60 min = 53/3600 h
10 km/(43 min and 53 sec) = 6.213671 mi/(43/60 + 53/3600 h)
You can find the answer on the calculator.
I wouldn't call this a chemistry question.
To find the runner's average speed in miles per hour, we'll first convert the distance from kilometers to miles.
1 kilometer is approximately equal to 0.621371 miles.
So, to convert 10 kilometers to miles, we can multiply it by the conversion factor:
10 kilometers * 0.621371 miles/kilometer = 6.21371 miles
Now, we need to convert the time from minutes and seconds to hours.
There are 60 minutes in an hour, so 43 minutes and 55 seconds can be converted to hours as follows:
43 minutes + (55 seconds / 60 seconds per minute) = 43.9167 minutes
43.9167 minutes / 60 minutes per hour = 0.732 hours (approximately)
Finally, to find the average speed, we divide the distance by the time:
Average Speed = Distance / Time
= 6.21371 miles / 0.732 hours
= 8.49 miles per hour (rounded to two decimal places)
Therefore, the runner's average speed in miles per hour is approximately 8.49 mph.
To find the runner's average speed in miles per hour, we need to convert the distance from kilometers to miles and the time from minutes to hours.
1 kilometer is approximately equal to 0.621371 mile, so we can convert the distance by multiplying 10.0 km by 0.621371.
10.0 km * 0.621371 = 6.21371 miles
Next, we'll convert the time from minutes to hours. Since there are 60 minutes in an hour, we divide the total time of 43 minutes and 55 seconds by 60 to get the time in hours.
43 minutes + 55 seconds / 60 = 0.73333 hours (approximately)
Now that we have the distance in miles (6.21371 miles) and the time in hours (0.73333 hours), we can calculate the average speed by dividing the distance by the time:
Average Speed = Distance / Time
Average Speed = 6.21371 miles / 0.73333 hours
Dividing these two values gives us:
Average Speed ≈ 8.476 miles per hour
Therefore, the runner's average speed is approximately 8.476 miles per hour.