Jawabanmu

2014-05-18T17:08:31+07:00
^ Semoga membantu , Sorry kalau Khilaff ^
Diketahui :
n = 2 1/2 = 5/2
s = 45 cm
t = 20 sekon
v = ??
Lamda = s/n
lamda = 45/5/2
lamda = 18 cm
T = t/n
T =20/5/2
T=8 sekon
V=lamda/T
V=18/8
V=2,25


terimah ksih ya :)
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