Question

in the cylinder radius is tripled and height is one third, curved surface area will be:
same
doubled
three times
four time ​

Answer 1

Answer:

doubled is the correct answer

Answer 2

Answer:

REMAINS SAME

let's take an example

Original R= 21. Original H = 7

LSA= 2πrh

2* 22/7*21 *7 = 924

New R after one third= 21/3

New H after triples= 7*3 = 21

LSA= 2* 22/7* 21/3*21

= 924

924 = 924

HENCEFORTH IT WILL REMAIN SAME