Jawabanmu

Jawaban paling cerdas!
2014-01-04T12:03:04+07:00
Diketahui : V1 = 3 m/s
A1 = π.4.4 = 16π cm²
A2 = π.8.8 = 64π cm²
A1 . v1 = A2 . v2
16π . 3 = 64π . v2
v2 = 48π/64π = 3/4 m/s
jadi, kecepatan aliran airnya adalah 3/4 m/s 
jawabannya B
1 5 1
2014-01-04T13:33:04+07:00
Q = A.v

 A_{1}.v= A_{2}.v

π r^{2} .v = π r^{2} .v

3,14×0,02×0,02 × 3 = 3,14×0,04×0,04 × v

v= 3/4