Question

High Uruer Ring Skills (HUIS)
2. If the radius of a cylinder is doubled and the
height is halved. What is the ratio between the
new curved surface area and the previous curved
surface area of the cylinder ?​

Answer 1

Answer:

1 : 1

Step-by-step explanation:

We can assume initial radius R and initial height H

Also we can assume final radius to be R' and final height be H'

Now R'=2R.

Also H'= H/2

Ratio of curved surface area =

2πR'H'/2πRH= R'H'/RH

Substituting R'=2R and H'=H/2

(2R×H/2)/RH

RH/RH

= 1