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A machinist creates a spacer by drilling a 3 cm diameter hole through the middle of a cylinder that has a diameter of 5 cm and a height of 0.5 cm. What is the volume of the finished spacer to the nearest tenth cm3?

 May 14, 2020
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We subtract the two volumes

 

π25*0.5 - π9*0.5 = 0.5π(25-9) = 0.5π * 16 = 8π.

 

That's 25.13 so 25.1

 

If you don't understand anything feel free to ask!  :)

 May 14, 2020
edited by hugomimihu  May 14, 2020

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