Please help me ASAP
And please answer my other questions

Hello!
If all of the dimensions are multiplied by 3, the volume will also be multiplied by 3.
Our answer is A) 3.
I hope this helps!
We know the formula for volume of cylinder of given by
V = π r² h
If the dimensions are tripled, new volume will be :-
V' = π (3r)² (3h) = π (9r²) (3h) = 27 π r² h = 27 V
We can see new volume is 27 times original volume.