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# C4 Differentiation Question watch

1. (Original post by katerobertsonxx)
I have had a go and I am even more confused now as I have no K anywhere,

I have written down:

Area= 6x2
Volume= x3

dA/dX= 12x
dV/dX= 3x squared

dA/dT= da/dX x dX/dV x dV/dT

= 12x x 1/3x squared x 1/2 V to the power 1/3?

am I completely going the wrong way?
That's all correct so far (as far as I can see) now just find dA/dT in terms of A only.
2. (Original post by B_9710)
That's all correct so far (as far as I can see) now just find dA/dT in terms of A only.
yay thankyou

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