Question

Q20
Please help me as soon as possible.

Answer 1

H. V is doubled

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Given formula:

• 
  `V=\pi r^2h`

Replace r with 2r and h with h/2 and see what happens to V₁:

• 
  `V_1=\pi (2r)^2(h/2)=\pi (4r^2)(h/2)=\pi (2r^2)h=2\pi r^2h=2V`

As we see the value of V is doubled, so the correct choice is H.