Please bantuin yg pinter fisika!

Nomor 6
Q₁ = Q₂
A₁v₁ = A₂v₂
1/4 πD₁²v₁ = 1/4 πD₂²v₂
v₁ = v₂ (D₂ / D₁)²
    = (10 m/s) [2 cm / (4 cm)]² = 2,5 m/s