- #1
Nitrate
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Homework Statement
At 9 a.m ship A is 50 km [E] of ship B. Ship a is sailing [N] at 40 km/h and ship B is sailing
Homework Equations
x^2 + y^2 = z^2
dz/dt [t=3h] = ?
db/dt = 30 km/h
da/dt = 40 km/h
The Attempt at a Solution
My instructor made me draw out a diagram
the diagram helped me determine that dy/dt = 70 km/h and that x = 50 km
so: x^2 + y^2 = z^2
50^2 + y^2 = z^2
2y(dy/dt) = 2z (dz/dt)
2y(70) = 2z (dz/dt)
Not sure if I'm doing this right/what to do next.