How Do You Apply the Chain Rule to Differentiate h = 3x^2y^3 with Respect to t?

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h = 3x^2.y^3
find dh/dt, if x=1, and y=2
Also, dx/dt = 0.2, dy/dt = 0.1

Any ideas where i should start in order to get this out?
Thanx
 
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\frac{dh}{dt} = \sum_i \frac{dF}{dx_i}\frac{dx_i}{dt}, you have the expression for h and the points at which to calculate the final answer.
 
I don't understand that expression, can you simplify your explanation please
 
If x is a function of t, f(x)= x^2, what does the chain rule say
df/dt is?
 

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