+0  
 
0
87
2
avatar+74 

The radius of a right circular cylinder is decreased by 20% and its height is increased by 25%. What is the absolute value of the percent change in the volume of the cylinder?

codehtml127  Jul 3, 2018
 #1
avatar+3039 
+1

Decreased by 20%=100%-20%=80%

Increased by 25%, 25/100*80=20, so 80+20=100%

Thus, there is no change, .\(0\%\)

smileysmiley

tertre  Jul 3, 2018
 #2
avatar
+1

V= Pi x r^2 x h

V =Pi x 1^2 x 1

V =Pi

 

V =Pi x  0.8^2 x 1.25

V =0.8Pi

1 - [0.8Pi/Pi] = 20% - absolute decrease in volume.

Guest Jul 3, 2018
edited by Guest  Jul 3, 2018

40 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.