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# connected rates of change c4 edexcel watch

1. Can someone help with question 9 of exercise 4E, rates of change differentiation, cant get my head around it. From the Heinemann c4 textbook.
2. (Original post by bat_man)
Can someone help with question 9 of exercise 4E, rates of change differentiation, cant get my head around it. From the Heinemann c4 textbook.
If this is the question you're reffering to
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You can form two equations, one which is given in the equation, dV/dt, and an equation for V which can be made by thinking about how volume is calculated.
From there, using those equations, you need to find a way to make an equation for dh/dt, can you think of how you could do this?
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Also this would probably be better suited in the maths forum Zacken
3. Moved to maths, thanks Kayla!
4. (Original post by KaylaB)
If this is the question you're reffering to
Spoiler:
Show
You can form two equations, one which is given in the equation, dV/dt, and an equation for V which can be made by thinking about how volume is calculated.
From there, using those equations, you need to find a way to make an equation for dh/dt, can you think of how you could do this?
Spoiler:
Show
Also this would probably be better suited in the maths forum Zacken
Thanks a bunch, i figured out what to do now!
5. (Original post by bat_man)
Thanks a bunch, i figured out what to do now!
Great

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