Question

if the radius of a cylinder is decrease by 10%while its height is increased by 20% then what will be effect on its total volume my options are
1.2.8% decrease
2.1.8% increase
3.2.8% increase
4.1.8% decrease
plz answer it don't spam​

Answer 1

The option 1 is the correct answer. If you want the stepwise solution, please comment.