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we know that,

The volume of cylinder having base radius = r

And original height of cylinder = h

Volume of cylinder (v) = π × r2 × h

New height H = h and

New radius R = 2r (new radius = 2 times of original radius)

New volume of cylinder(V) = π × 4r2 × h = πr2h = v Hence, the volume of new cylinder = the volume of original cylinder.

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