Odpowiedzi

2010-03-09T18:14:13+01:00
S=3,5km=3500m
t=45min40s=2740s
s1=100m
t1=?
-----------------------------------------------
V=s/t=3500/2740s=1,28m/s
V=s1/t1
t1=s1/V=100m/(1,28m/s)=78s
1 3 1
2010-03-09T18:15:46+01:00
Najłatwiej zrobić to tak

3km500m=3500m
45min40sek=2740s
czyli:

3500m--2740s
a:
100m to nasz X

X=(100*2740):3500
X=274000:3500=78.3sek (w przybliżeniu)
2010-03-09T18:27:45+01:00


3500m-2740s
100m-x

x=100m*2740s/3500km
x=274000s/3500
x=2740s/35
około x=78s