H, I think. The oil has a lower density than the water, so after the 3 minutes it would float on top of the water.
The final answer is B hope its helps
Answer:
V2 = 1.33m/s
Explanation:
M1 = 30 ton
M2 = 90 ton
V1 = 4 m/s
V2 = ?
Assumption: momentum conserved, no friction
initial momentum = final momentum = 0
momentum : p = MV
(M1*V1) - (M2*V2) = 0
V2 = (30*4)/90 = 1.33m/s
It's definitely not one of the graphs you gave us to choose from.