- #1

JPC

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- 1

## Homework Statement

Hello

Its a pretty tricky question ! Help me find the answer so i can finally sleep (i only get the answer when i hand in the question sheets in 3 weeks) :D

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You walk for 1 hour, and do 5 miles during that hour

Question : show that there exist a time interval of length 30minutes during which you have walked 2.5 miles

## Homework Equations

## The Attempt at a Solution

I thought about writing :

dD = Vi * dt

where D : distance

t = time

(Vi = dP / dt)

And integrating dD between 0 and 1hour. and saying that the whole is equal to 5 miles

and then separate the integral into 3 ones where one is from 0 to 30 minutes

but it doesn't lead to much conclusions

Any ideas would be appreciated, thank you :)