My Math Forum Really need help

 Calculus Calculus Math Forum

 April 29th, 2019, 03:01 AM #1 Newbie   Joined: Apr 2019 From: Philippines Posts: 4 Thanks: 0 Really need help I'm really confused about the performance task my teacher gave us, we need to select an object and find its area and volume using integration and I don't know what object to use
 April 29th, 2019, 03:15 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,966 Thanks: 2216 You could use a cube. The integrals will then be very easy to evaluate. Thanks from Maschke and Benit13
 April 29th, 2019, 04:09 AM #3 Newbie   Joined: Apr 2019 From: Philippines Posts: 4 Thanks: 0 Thank you
 April 29th, 2019, 06:47 PM #4 Newbie   Joined: Apr 2019 From: Philippines Posts: 4 Thanks: 0 Can we also get the centroid and length of arc using integration?
 April 30th, 2019, 04:23 AM #5 Global Moderator   Joined: Dec 2006 Posts: 20,966 Thanks: 2216 Yes, but do you mean for separate objects?
April 30th, 2019, 05:47 AM   #6
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Quote:
 Originally Posted by skipjack You could use a cube. The integrals will then be very easy to evaluate.
This. Also, prisms, cones and cylinders are all pretty easy to integrate

 April 30th, 2019, 12:24 PM #7 Member     Joined: Feb 2019 From: United Kingdom Posts: 44 Thanks: 3 Choose a cylinder and sphere. It will demonstrate Archimedes was one of the first to show volume is a limit process. By the way, how are you associating arc length with a geometric figure? Do you want to determine the length of a side or something?

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