Solving Squid Propulsion with Momentum Conservation Equation

[isukatphysics69]

Homework Statement

Homework Equations

p=mv
j=Δp[/B]

The Attempt at a Solution

I am confused as to how to approach this problem. so it looks like squidwards mass is changing from 1.2kg to 1.1kg after he shoots out the water from his butt. I know that momentum is conserved so

1.1*2.7 - 1.2*0.6 should = 0.
this leaves -2.25kgm/s left. so then i would have to divide by his mass? so his mass is currently 1.1kg which gives a speed of 2.0454545m/s

 

[isukatphysics69]

ok i am completely wrong here and don't know what i am doing

 

[isukatphysics69]

Ahh ok i got it.
So the momentum is conserved

1.2kg*.60m/s = 1.1kg*2.7m/s - .10kg*v<sub>water

-2.25kgm/s / -.10kg = vwater = 22.5m/s</sub>Why is that so small ? i tried to edit it

-2.25kgm/s / -.10kg = v_water = 22.5m/s​