800
800
meetri jooksja läbis esimese ringi
51
,
4
51
,
4
ja teise
53
,
3
53
,
3
sekundiga. Milline oli tema keskmine kiirus?
8
m
/
s
8
m
/
s
6
k
m
/
h
6
k
m
/
h
7
,
64
m
/
s
7
,
64
m
/
s
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