Question

if in a cylinder radius is doubled and height is halved then what is percent change in volume

Answer 1

hi there,
volume of cylinder=πr^2h
if new radius=2r
and new height is h/2
new volume=2π4r^2*h/2.
therefore the volume will be doubled
i hope this helps u.. nd pls smash the thanks button 

Answer 2

given :
radius is doubled in a cylinder
height is halved

need to find out :
the percent change in volume  

solution :
we know that volume of cylinder = $\pi$ r² h
the radius according to the question =  2r
the height according to the question = h/2
∴ the new volume = 2$\pi$ 4r² h/2

by this we can understand that the volume would double