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Fitzpatrick Rates Question: (1 Viewer)

Mr Slick

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Can anyone do question 24) from exercise 25 (a) from Fitzpatrick Book

Thanks in advance
 

deswa1

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Can anyone do question 24) from exercise 25 (a) from Fitzpatrick Book

Thanks in advance
Can you type out the question or scan it? I don't have a copy of the book...
 

barbernator

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The question is as follows:
A circular cylinder of height 6cm and base radius 4cm sits on a table with its axis vertical. A point source of light moves vertically upwards at a speed of 3cm/s above the central axis of the cylinder, thus casting a circular shadow on the table. Find the rate at which the radius of the shadow is decreasing when the light is at a distance 4cm above the top of the cylinder
 

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