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2023 HSC Q13.a) (1 Viewer)

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I can find the solution if I use the method in the marking guidelines. However, why doesn't my method give the correct answer?

i. is good.
ii. is good.
iii. is wrong.
h is only equal to if dh/dt = k/hpi. since the rate of change to empty the container is not equal the rate to fill the container then you cannot substitute h as . also in ur final line u cube rooted both sides of the equation but the 2 is only square rooted
 

ISAM77

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h is only equal to if dh/dt = k/hpi. since the rate of change to empty the container is not equal the rate to fill the container then you cannot substitute h as . also in ur final line u cube rooted both sides of the equation but the 2 is only square rooted
thkyou!
 

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