Question

If the radius of a cylinder is doubled, its volume will be (1) 4 times (2) 1/2times (3) 1/4times (4) 2times​

Answer 1

Answer:

1)4 times

Step-by-step explanation:

Let the radius of first cylinder be 'r',

We know that volume of cylinder =πr^2h

Therefore volume of first cylinder =πr^2h

If radius of cylinder is double it wil be equal to=2r

Therefore, volume of second cylinder =π(2r)^2=π4r^2h

Then, volume of second cylinder/volume of first cylinder

=π4r^2h/πr^h

=4

Therefore, the volume of second cylinder is 4 times the first cylinder.