Jawapan

  • Pengguna Brainly
2016-02-13T17:28:39+08:00
S = d/t
s = 1400/60m
s = 23.33 ms^-1
1 5 1
2016-02-14T13:27:24+08:00
Average speed= distance
--------------
time
speed= 1400nm
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60+45minute

= 1400nm
------------
105m

= 13.333nm^-1