Best Answer

Simply add your times and divide by the distance (or visa-versa).

21 minutes + 63 minutes = 84 minutes

84 minutes/10 miles = 8.4 minute miles.

Note, this is a convenient form to calculate speed for runners. However, the "standard" would be in MPH (or the metric equivalent).

(10 miles / 84 minutes)*(60 minutes/hour) = 7.14 MPH

A common fallacy might be to calculate the speed in each leg of the race and average.

3 miles in 21 minutes = 7 minute miles.

7 miles in 63 minutes = 9 minute miles.

If you average these two you get 8 minute miles WHICH IS INCORRECT.

The problem with this is that the runner ran each pace for different distances. If the distances at each pace were the same, then this would work.

Q: Kerry ran a 10-mile race She ran the first three miles in 21 minutes She ran the last seven miles in 63 minutes What was her average speed in the race?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

The first running average is the first grade. The second running average (RA) is the average of the first two grades, the third RA is the average of the first three grades and so on.

3 Miles in 19.5 minutes (19 minutes 30 seconds) is 1 mile in 6.5 minutes (6 minutes 30 seconds). (19.5 ÷ 3 = 6.5)That is based on her average speed. It is safe to assume that she can run one mile or just even the first of 3 miles in less time, probably around 6 minutes. That is a good pace! A 5k (five kilometers) run is about 3.107 miles. A mile in 6.5 minutes is the same as 3.107 miles in 20 minutes 11.7 seconds (average speed of 9.23 MPH).The female record for a 5K is about 14 minutes 11 seconds. A very good time is still 17-20 minutes. A good beginners time is around 30 minutes.

It is a time which is 260 minutes after the first.

First, you can convert the 8 hours to 7 hours and 60 minutes. Then it's easy to subtract minutes from minutes.

The average of the first n even numbers is n+1, so 101.The average of the first n even numbers is n+1, so 101.The average of the first n even numbers is n+1, so 101.The average of the first n even numbers is n+1, so 101.

Related questions

Kerry won their first and only All-Ireland Hurling title in 1891. Gaelic Football is the main sport in Kerry and they won the first of their 36 All-Ireland Football titles in 1903.

To the surprise of many people, Mr. Obama named Hillary Clinton (his former rival for the nomination) to be Secretary of State during his first term. For his second term, he named Massachusetts Senator John Kerry to be Secretary of State.

The Kerry Blue Terrier was first bred as a versatile worker to hunt vermin, small game and birds, retrieve game from land and water and herd livestock including sheep and cattle. Learn more about the breed history of the Kerry Blue Terrier at the related link.

Kerry Collins

Killarney co kerry

Kerry Earnhardt's mother's name is Latane Brown. She was Dale Earnhardt Sr's first wife.

13

Andrew (Kerry) aka Mattressman

24 hours

The idea is to divide the distance by the time. Since presumably you want the answer in miles/hour, you should first convert the minutes to hours.

The average speed over the first 30 miles is equal to the average speed over the next 15 miles. You cannot guarantee that the speed was constant inbetween, though. The average speeds are 45 MPH for each leg.

No, John Kerry did also.