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# C3 Rates of Change question watch

1. Dv/dx= 12(pi)x - (pi)x^2
So I did Dv/dT=27(pi) x dx/dT
Don't know how to workout dx/dT....
2. they have told you dV/dt.... just divide it by dV/dx ( which you worked out correctly ) to get dx/dt
3. (Original post by TSRforum)

Dv/dx= 12(pi)x - (pi)x^2
So I did Dv/dT=27(pi) x dx/dT
Don't know how to workout dx/dT....
dx/dt = dx/dv * dv/dt
4. (Original post by the bear)
they have told you dV/dt.... just divide it by dV/dx ( which you worked out correctly ) to get dx/dt

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5. (Original post by Zacken)
dx/dt = dx/dv * dv/dt
Where do I sub in 2?(depth of bowl water)

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6. (Original post by TSRforum)
Where do I sub in 2?(depth of bowl water)

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in dx/dv

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Updated: February 5, 2016
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